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is.13757.1993.pdf-Clay flyash burnt brick

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Clay flyash burnt bricks

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Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. 爐爐爐爐萎え爛爐 爐爐鉦え爐 !爐鉦え $ 爐踱 爐' 爐爐鉦ぐ爐 爐爐 +爐爐-爐ｂ Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 爐0爐萎ぞ1 爐爛 爐爛爐 爐' 5 爐むぐ爐 Jawaharlal Nehru Step Out From the Old to the New 爐爐鉦え1 爐爐 爐+爐о爐鉦ぐ, 爐爛1 爐爐 爐+爐о爐鉦ぐ Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live !爐鉦え 爐踱 爐爐伍ぞ 爐爐爐鉦え爐 > 爐爛 爐爐爛 爐0爐萎ぞ爐爐 爐爐B 爐爐 爐伍爐むぞ 爐項 Bhart畊hariN朝tiatakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge 爐項 爐高 爐 IS 13757 (1993): Burnt clay fly ash building bricks-Specification [CED 30: Clay and Stabilized Soil Products for Construction]
is.13757.1993.pdf-Clay flyash burnt brick
is.13757.1993.pdf-Clay flyash burnt brick
IS 13757 : 1993 Reaffirmed 2007 Indian Standard BURNT CLAY FLY ASH BUILDING BRICKS SPECIFICATION UDC 691揃421揃431 BIS 1993 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 April 1993 息 Price Group 2
AMENDMENT NO.1 MARCH 2008 TO IS 13757 : 1993 BURNT CLAY FLY ASH BUILDING BRICKS - SPECIFICATION (Page 2, clause 7.I.l,fourth line) - Insert 'by more than IS percent' after 'class ofbrick'. (CED 30) Reprography Unit,81S,New Delhi, India
Clay Products tor Buildings Sectional Committee, CBD 30 FOREWORD Increasing number of thermal power plants have been coming up in the country and bringing' with them an acute environmental problem in the form oftlyash. Dumping of dry ftyash on land devours large areas of fertile land and also flies off in the air to places near the dumping around making the atmosphere dusty and unhealthy. Wet dumping with water creates problems like polluting the ground water in addition to devouring the land where this flyash slurry is disposed off in ponds. To overcome these problem, many new uses for ftyash have been found out through research. One such use is the use of flyash for making building bricks in conjunction with clay. This use of ftyash has the added advantage of conserving the fertile top soil in brick manufacturing areas. Further, addition of flyash even improves the brick making qualities of certain types of soils. The standard has been prepared on similar lines to the Indian Standard IS 1077: 1992, Specification for common burnt clay building bricks (fifth revision ), keeping in view the same end use to which these two type of bricks are put. Keeping in view the advantages of modular co-ordination, Indian standards specify the dimensions of standards bricks in 100 mm module as the basis of all dimensional standardization in regard to building components. This is also in confirmity with the decision of Government of India to adopt metric system in the country. Considering the various issues regarding the manufacturing and other practices followed in the country, the Sectional Committee responsible for the preparation of this standard had specified modular size of the brick. Advantages that a modular brick has over traditional brick are many, such as: a) requires less drying area; b) saving in space of floor area; c) economy in cost of brick masonry; d) saving in labour cost; e) less losses during handling etc; and f) less consumption of mortar.: However, it was brought to the notice of committee that there was sufficient demand for sizes. other than modular sizes and that the manufacturers were meeting such demands at present. this had led to a situation where bricks satisfying other reguirments of the standard, but not the' requirements regarding dimensions were classified as not satisfying the requirements of the standard. Therefore, the Committee has decided to include the non-modular size of the brick in. addition to the modular size. This relaxation will be for a period of four years from the publi- cation of this standard and it is intended that the manufacturers and consumer organization can gradually switch over within this period to the modular sizes, which are the preferred sizes. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded' off in accordance with IS 2 : 1960 'Rules for rounding off numerical values ( rev;Gtd)'. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
IS 13757: 1993 . '~:'. Indian Standard ~. ' . BURNT CLAY FLY ASH BUILDING BRICKS . 'SPECIFICATION 1 SCOPE 5 GENERAL QUALITY 1.1 This standard lays down requirements for -classification, general quality, dimensions and physical requirements of common burnt clay building bricks used in buildings. NOTE - Burnt clay ftyash bricks having compres- sive strength less than 30 N/mm' approximately 300 kgf/em- are covered in this standard and for higher strength, see IS 2180 : 1988 and IS 1077 : 1992. 2 REFERENCES 2.1 The Indian Standards listed in Annex A arc necessary adjuncts to this standard. 3 TERMINOLOGY 3.1 For the purpose of this standard, the definitions given in IS 2248: 1981 (under revision) shall apply. -4 CLASSIFICATION 5.1 Clay ftyash bricks shall be hand or machine moulded and shall be made from the admixture of suitable soils and flyash in optimum soils and ftyash in optimum proportions, see IS 2117 : 1991 The ftyash used for manufacture of bricks shall conform to grade 1 or grade 2 as per IS 3812 : 1981. The bricks shall be uniformly burnt, free from cracks and flaws as black coring, nodules of stone and!or free lime and organic matter. In case of non-modular size of bricks, frog dimensions shall be the same as for modular size bricks. 5.2 Hand-moulded bricks of 90 mm or 70 mm height shall be moulded with a frog 10 to 20 mm deep on one of its flat sides; the shape and size of the frog shall conform to either Fig. lA or Fig. 1B (Refer 6.1.1 for L, Wand H). Bricks of 40 or 30 mm height as weU as those made by extrusion process may not be provided with frogs. 4.1 Burnt clay fly ash bricks shall be classified on the basis of average compressive strength as given in Table 1. Table 1 Classes or Barnt Clay-Fly Asb Bricks ( Clause 4.1 ) 5.3 The bricks shall have smooth rectangular faces with sharp corners and shall be uniform in shape and colour. (j DIMENSIONS AND TOLERANCES 6.1 DimeDsions 6.1.2 The following non-modular sizes of the bricks may also be used ( Fig. lA and Fig. IB ): 230 110 70 230 110 30 Clal. Designation 30 25 20 17'S IS 12'5 10 7揃5 S 3揃S AyerSle Compressl,e Streaatb Not Les. tban r-------.JI-.------~ N/mml kgf/em' (Appox) 30.0 ( 300) 25'0 ( 250 ) 20'0 ( 200) 17'S ( 175 ) JS揃O ( ISO) 12'S ( 125) 10揃0 ( 100 ) 7揃' ( 75 ) S'O ( SO ) 3揃5 ( 35 ) 6.1.1 The standard modular building fly ash bricks shall ( Fig. IA and IB ): Length (L) Width (W) mm mm 190 90 190 90 sizes of clay be as follows Height (H) mm 90 40 H -.I I w I ----~ 18 lA All dimensions in mllllmetres, FlO. 1 SHAPE AND SIZE 0' FROGS IN BRICK.S 1 H J ) 1/ VJ- L-揃--~ I.
1/3 length brick 1/2 width brick IS 13757: 1"3 6.1.2.1 For obtaining proper bond arrangement end modular dimensions for the brickwork, with the non-modular size., the (gnowing sizes of the bricks may also be used: 70 110 70 230 SO 70 r '.2 Tolerances The dimensions of bricks when tested in accordance with 6.2.1 shan be within the following limits per 20 bricks: t a) For modular size Length 3 720 to 3880 mm ( 3800l賊 80 rom ) Width 1760 to 1840 mm ( 1800 賊 40 rom ) Height 1760to 1840 mm ( 1800 賊 40 rom ) : l ( For 90 mm high bricks) 760 to 840 mm (800 賊 40 rom ) ( For 40 mm high bricks) b) For non-modular size Length 4520 to 4680 mm (4600 賊 80 rom) WIdth 2240 to 2160 mm (2200 賊 40 mm ) Height 1440 to 1360 ~m ( 1400 賊 40 mm ) ( For 70 mm high bricks) 640 to 560 rom (600 賊 40 rom ) ( For 30 mm high bricks) sha.ll be removed. They shall then be arranged upon a level surface successively as indicated in Fig. 2A, 2B and 2C in contacrwltb each other and in a straight line. The overall length of the assembled bricks shall be measured with a steel tape or other suitable inextensible measure sufficiently long to measure the whole row at one stretch. Measurement by repeated applica- tion of short rule or measure shall not be permitted. If, for any reason it is found impracticable to measure bricks in one row, the sample may be divided into rows of 10 bricks each which shall be measured separately to the nearest millimetre. All these dimensions shall be added together. 7 PHYSICAL REQUIREMENTS 7.1 Compressive Strength The bricks, when tested in accordance with the procedure laid down in IS 3495 ( Part 1 ) : 1992 shall have a minimum average compressive strength for various classes as given in 4.1. 7.1.1 The compressive strength of any individual brick tested shall not fall below the minimum compressive strength specified for the corres- ponding class of brick. The lot shall be then checked for next lower class of brick. 7.2 Water Absorption 6.2.1 Twenty ( or more according to the size of The bricks, when tested in accordance with the stack) whole bricks shall be selected at random procedure laid down in IS 3495 ( Part 2 ) : 1992 from the sample selected under I. All blisters, after immersion in cold water for 24 hours, loose particles of clay and small projections water absorption shall not be more than 20 per- 2A MEASUREMENT OF LENGTH 28 MEASUREMENT OF WIDTH 2C MEASUREMENT OF HEIGHT FlO. 2 MBASOIlIMBIlT 0' TOLIR.ANCBS 0' COMMON BUILDING SaICE5- 2
IS 13757: 1"3 cent by weight up to class 12.5 and 15 percent by weight for higher classes. 7.3 EfBorescence The bricks when tested in accordance with the procedure laid down in IS 3495 ( Part 3 ) : 1992 the rating of efflorescence shall not be more than 'moderate' up to class 12.5 and 'slight' for higher classes. 8 SAMPLING AND CRITERION FOR CONFORMITY 8.1 Sampling of clay-flyash building bricks shall be done in accordance with the procedure laid down in IS 5454 : 1978. The criterion for conformity shall be as given in IS 5454: 1978. 9 MARKING Ttv.-Each brick shall be marked (in the frog where provided) with the manufacturer's identi- fication mark or initials. 9.1.1 The manufacturer may also use the Stan- dard mark. ANNEX A ( Clause 2.1 ) LIST OF REFERRED INDIAN STANDARDS Methods for sampling of clay building bricks (first revision) Specification for fly ash for use as pozzolana and admixture ( first revision) 5454 : 1978 3812 : 1981 IS No. Title 3495 Methods of tests of burnt clay ( Part 2 ) : 1992 building bricks : Part 2 Deter- mination of water absorption ( second revision ) 3495 Methods of tests of burnt clay ( Part 3 ) : 1992 building bricks : Part 3 Deter- mination of efflorescence ( second revision) Title 2248 : 1981 Specification for common burnt clay building bricks (fifth revision) Guide for manufacture of hand made common burnt clay building bricks (second revision) Specification for heavy-duty burnt clay building bricks ( second revision ) Glossary of terms relating to structural clay products for buildings (first revision) 3495 Methods of tests of burnt clay (Part 1 ) : 1992 building bricks: Part 1 Deter- mination of compressive strength ( second revision ) 2180 : 1988 2117 : 1991 IS No. 1077 : 1992 3
Standard Mark The use of the Standard Mark is governed by tbe provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by DIS and operated by the pro- ducer. Standard marked products are also continuously checked by BIS for conformity to that standard 8S a further safeguard. Details of conditionsunder which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained.from the Bureau of Indian Standards.
Bareaa 01 IDdia. StIDd.rd. BIS is a statutory institution established under the Bureau o/lndla" SttJnda,tb Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification or soods and attending to connected matters in the country. Copyr1aht BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does Dot preclude the free usc, In the course of implementing the standard, of necessary details, such as symbols and sizes, types or grade designations. Enquiries relating to copyright be addressed to the Director ( Publications ), DIS. Renew of Indian Standards Amendments are issued to standards as the need arises on the basis ofcomments. Standards are also reviewed periodically; a standard aloDS with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed. it is taken up for re- vision. Users of Indian Standards should ascertain that they are in possession of the latest amend- ments or edition by referring to the latest issue of 'SIS Handbook' and 'Standards Monthly Additions'. Comments on this Indian Standard may be sent to DIS giving the following reference: Doc: No. CEO 30 ( 4978 ) AmendmeDts Issued SiDee PablleatloD Amend No. Date of Issue BURBAU OF INDIAN STANDARDS Text Affected Headquarters: Manak Bhavan, 9 Babadur Shah Zalar Marg, New Delhi 110002 Telephones: 331 01 31, 331 13 75 Regional Offices: Central: Manak Bhavan, 9 Bahadur Shah zafar Mars NEW DELHI 110002 Eastern: 1/14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola CALCUTTA 700054 Northern: SeQ 44S-446, Sector 3S-C, CHANDIGARH 160036 Southern: C. I. T. Campus, IV Cross Road, MADRAS 600113 Western: Manakalaya, B9 MIDC, Marol, Andheri ( East) BOMBAY 400093 Telegrams : Manaksanstha (Common to all Offices) Telephone { 331 01 31 331 13 75 { 37 84 99, 37 85 61 37 86 26, 37 86 62 { 53 38 43. S3 16 40 53 23 84 { 23S02 16, 23S 04 42 235 15 19, 235 23 l' { 632 92 95, 632 78 S8 632 78 91, 632 78 92 Branches: AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. OHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. PATNA. THIRUVANANTHAPURAM. PrlntOd at ParaloD Bnterprilu, Delhi. IDal.

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is.13757.1993.pdf-Clay flyash burnt brick

  • 1. Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. 爐爐爐爐萎え爛爐 爐爐鉦え爐 !爐鉦え $ 爐踱 爐' 爐爐鉦ぐ爐 爐爐 +爐爐-爐ｂ Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 爐0爐萎ぞ1 爐爛 爐爛爐 爐' 5 爐むぐ爐 Jawaharlal Nehru Step Out From the Old to the New 爐爐鉦え1 爐爐 爐+爐о爐鉦ぐ, 爐爛1 爐爐 爐+爐о爐鉦ぐ Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live !爐鉦え 爐踱 爐爐伍ぞ 爐爐爐鉦え爐 > 爐爛 爐爐爛 爐0爐萎ぞ爐爐 爐爐B 爐爐 爐伍爐むぞ 爐項 Bhart畊hariN朝tiatakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge 爐項 爐高 爐 IS 13757 (1993): Burnt clay fly ash building bricks-Specification [CED 30: Clay and Stabilized Soil Products for Construction]
  • 4. IS 13757 : 1993 Reaffirmed 2007 Indian Standard BURNT CLAY FLY ASH BUILDING BRICKS SPECIFICATION UDC 691揃421揃431 BIS 1993 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 April 1993 息 Price Group 2
  • 5. AMENDMENT NO.1 MARCH 2008 TO IS 13757 : 1993 BURNT CLAY FLY ASH BUILDING BRICKS - SPECIFICATION (Page 2, clause 7.I.l,fourth line) - Insert 'by more than IS percent' after 'class ofbrick'. (CED 30) Reprography Unit,81S,New Delhi, India
  • 6. Clay Products tor Buildings Sectional Committee, CBD 30 FOREWORD Increasing number of thermal power plants have been coming up in the country and bringing' with them an acute environmental problem in the form oftlyash. Dumping of dry ftyash on land devours large areas of fertile land and also flies off in the air to places near the dumping around making the atmosphere dusty and unhealthy. Wet dumping with water creates problems like polluting the ground water in addition to devouring the land where this flyash slurry is disposed off in ponds. To overcome these problem, many new uses for ftyash have been found out through research. One such use is the use of flyash for making building bricks in conjunction with clay. This use of ftyash has the added advantage of conserving the fertile top soil in brick manufacturing areas. Further, addition of flyash even improves the brick making qualities of certain types of soils. The standard has been prepared on similar lines to the Indian Standard IS 1077: 1992, Specification for common burnt clay building bricks (fifth revision ), keeping in view the same end use to which these two type of bricks are put. Keeping in view the advantages of modular co-ordination, Indian standards specify the dimensions of standards bricks in 100 mm module as the basis of all dimensional standardization in regard to building components. This is also in confirmity with the decision of Government of India to adopt metric system in the country. Considering the various issues regarding the manufacturing and other practices followed in the country, the Sectional Committee responsible for the preparation of this standard had specified modular size of the brick. Advantages that a modular brick has over traditional brick are many, such as: a) requires less drying area; b) saving in space of floor area; c) economy in cost of brick masonry; d) saving in labour cost; e) less losses during handling etc; and f) less consumption of mortar.: However, it was brought to the notice of committee that there was sufficient demand for sizes. other than modular sizes and that the manufacturers were meeting such demands at present. this had led to a situation where bricks satisfying other reguirments of the standard, but not the' requirements regarding dimensions were classified as not satisfying the requirements of the standard. Therefore, the Committee has decided to include the non-modular size of the brick in. addition to the modular size. This relaxation will be for a period of four years from the publi- cation of this standard and it is intended that the manufacturers and consumer organization can gradually switch over within this period to the modular sizes, which are the preferred sizes. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded' off in accordance with IS 2 : 1960 'Rules for rounding off numerical values ( rev;Gtd)'. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
  • 7. IS 13757: 1993 . '~:'. Indian Standard ~. ' . BURNT CLAY FLY ASH BUILDING BRICKS . 'SPECIFICATION 1 SCOPE 5 GENERAL QUALITY 1.1 This standard lays down requirements for -classification, general quality, dimensions and physical requirements of common burnt clay building bricks used in buildings. NOTE - Burnt clay ftyash bricks having compres- sive strength less than 30 N/mm' approximately 300 kgf/em- are covered in this standard and for higher strength, see IS 2180 : 1988 and IS 1077 : 1992. 2 REFERENCES 2.1 The Indian Standards listed in Annex A arc necessary adjuncts to this standard. 3 TERMINOLOGY 3.1 For the purpose of this standard, the definitions given in IS 2248: 1981 (under revision) shall apply. -4 CLASSIFICATION 5.1 Clay ftyash bricks shall be hand or machine moulded and shall be made from the admixture of suitable soils and flyash in optimum soils and ftyash in optimum proportions, see IS 2117 : 1991 The ftyash used for manufacture of bricks shall conform to grade 1 or grade 2 as per IS 3812 : 1981. The bricks shall be uniformly burnt, free from cracks and flaws as black coring, nodules of stone and!or free lime and organic matter. In case of non-modular size of bricks, frog dimensions shall be the same as for modular size bricks. 5.2 Hand-moulded bricks of 90 mm or 70 mm height shall be moulded with a frog 10 to 20 mm deep on one of its flat sides; the shape and size of the frog shall conform to either Fig. lA or Fig. 1B (Refer 6.1.1 for L, Wand H). Bricks of 40 or 30 mm height as weU as those made by extrusion process may not be provided with frogs. 4.1 Burnt clay fly ash bricks shall be classified on the basis of average compressive strength as given in Table 1. Table 1 Classes or Barnt Clay-Fly Asb Bricks ( Clause 4.1 ) 5.3 The bricks shall have smooth rectangular faces with sharp corners and shall be uniform in shape and colour. (j DIMENSIONS AND TOLERANCES 6.1 DimeDsions 6.1.2 The following non-modular sizes of the bricks may also be used ( Fig. lA and Fig. IB ): 230 110 70 230 110 30 Clal. Designation 30 25 20 17'S IS 12'5 10 7揃5 S 3揃S AyerSle Compressl,e Streaatb Not Les. tban r-------.JI-.------~ N/mml kgf/em' (Appox) 30.0 ( 300) 25'0 ( 250 ) 20'0 ( 200) 17'S ( 175 ) JS揃O ( ISO) 12'S ( 125) 10揃0 ( 100 ) 7揃' ( 75 ) S'O ( SO ) 3揃5 ( 35 ) 6.1.1 The standard modular building fly ash bricks shall ( Fig. IA and IB ): Length (L) Width (W) mm mm 190 90 190 90 sizes of clay be as follows Height (H) mm 90 40 H -.I I w I ----~ 18 lA All dimensions in mllllmetres, FlO. 1 SHAPE AND SIZE 0' FROGS IN BRICK.S 1 H J ) 1/ VJ- L-揃--~ I.
  • 8. 1/3 length brick 1/2 width brick IS 13757: 1"3 6.1.2.1 For obtaining proper bond arrangement end modular dimensions for the brickwork, with the non-modular size., the (gnowing sizes of the bricks may also be used: 70 110 70 230 SO 70 r '.2 Tolerances The dimensions of bricks when tested in accordance with 6.2.1 shan be within the following limits per 20 bricks: t a) For modular size Length 3 720 to 3880 mm ( 3800l賊 80 rom ) Width 1760 to 1840 mm ( 1800 賊 40 rom ) Height 1760to 1840 mm ( 1800 賊 40 rom ) : l ( For 90 mm high bricks) 760 to 840 mm (800 賊 40 rom ) ( For 40 mm high bricks) b) For non-modular size Length 4520 to 4680 mm (4600 賊 80 rom) WIdth 2240 to 2160 mm (2200 賊 40 mm ) Height 1440 to 1360 ~m ( 1400 賊 40 mm ) ( For 70 mm high bricks) 640 to 560 rom (600 賊 40 rom ) ( For 30 mm high bricks) sha.ll be removed. They shall then be arranged upon a level surface successively as indicated in Fig. 2A, 2B and 2C in contacrwltb each other and in a straight line. The overall length of the assembled bricks shall be measured with a steel tape or other suitable inextensible measure sufficiently long to measure the whole row at one stretch. Measurement by repeated applica- tion of short rule or measure shall not be permitted. If, for any reason it is found impracticable to measure bricks in one row, the sample may be divided into rows of 10 bricks each which shall be measured separately to the nearest millimetre. All these dimensions shall be added together. 7 PHYSICAL REQUIREMENTS 7.1 Compressive Strength The bricks, when tested in accordance with the procedure laid down in IS 3495 ( Part 1 ) : 1992 shall have a minimum average compressive strength for various classes as given in 4.1. 7.1.1 The compressive strength of any individual brick tested shall not fall below the minimum compressive strength specified for the corres- ponding class of brick. The lot shall be then checked for next lower class of brick. 7.2 Water Absorption 6.2.1 Twenty ( or more according to the size of The bricks, when tested in accordance with the stack) whole bricks shall be selected at random procedure laid down in IS 3495 ( Part 2 ) : 1992 from the sample selected under I. All blisters, after immersion in cold water for 24 hours, loose particles of clay and small projections water absorption shall not be more than 20 per- 2A MEASUREMENT OF LENGTH 28 MEASUREMENT OF WIDTH 2C MEASUREMENT OF HEIGHT FlO. 2 MBASOIlIMBIlT 0' TOLIR.ANCBS 0' COMMON BUILDING SaICE5- 2
  • 9. IS 13757: 1"3 cent by weight up to class 12.5 and 15 percent by weight for higher classes. 7.3 EfBorescence The bricks when tested in accordance with the procedure laid down in IS 3495 ( Part 3 ) : 1992 the rating of efflorescence shall not be more than 'moderate' up to class 12.5 and 'slight' for higher classes. 8 SAMPLING AND CRITERION FOR CONFORMITY 8.1 Sampling of clay-flyash building bricks shall be done in accordance with the procedure laid down in IS 5454 : 1978. The criterion for conformity shall be as given in IS 5454: 1978. 9 MARKING Ttv.-Each brick shall be marked (in the frog where provided) with the manufacturer's identi- fication mark or initials. 9.1.1 The manufacturer may also use the Stan- dard mark. ANNEX A ( Clause 2.1 ) LIST OF REFERRED INDIAN STANDARDS Methods for sampling of clay building bricks (first revision) Specification for fly ash for use as pozzolana and admixture ( first revision) 5454 : 1978 3812 : 1981 IS No. Title 3495 Methods of tests of burnt clay ( Part 2 ) : 1992 building bricks : Part 2 Deter- mination of water absorption ( second revision ) 3495 Methods of tests of burnt clay ( Part 3 ) : 1992 building bricks : Part 3 Deter- mination of efflorescence ( second revision) Title 2248 : 1981 Specification for common burnt clay building bricks (fifth revision) Guide for manufacture of hand made common burnt clay building bricks (second revision) Specification for heavy-duty burnt clay building bricks ( second revision ) Glossary of terms relating to structural clay products for buildings (first revision) 3495 Methods of tests of burnt clay (Part 1 ) : 1992 building bricks: Part 1 Deter- mination of compressive strength ( second revision ) 2180 : 1988 2117 : 1991 IS No. 1077 : 1992 3
  • 10. Standard Mark The use of the Standard Mark is governed by tbe provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by DIS and operated by the pro- ducer. Standard marked products are also continuously checked by BIS for conformity to that standard 8S a further safeguard. Details of conditionsunder which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained.from the Bureau of Indian Standards.
  • 11. Bareaa 01 IDdia. StIDd.rd. BIS is a statutory institution established under the Bureau o/lndla" SttJnda,tb Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification or soods and attending to connected matters in the country. Copyr1aht BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does Dot preclude the free usc, In the course of implementing the standard, of necessary details, such as symbols and sizes, types or grade designations. Enquiries relating to copyright be addressed to the Director ( Publications ), DIS. Renew of Indian Standards Amendments are issued to standards as the need arises on the basis ofcomments. Standards are also reviewed periodically; a standard aloDS with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed. it is taken up for re- vision. Users of Indian Standards should ascertain that they are in possession of the latest amend- ments or edition by referring to the latest issue of 'SIS Handbook' and 'Standards Monthly Additions'. Comments on this Indian Standard may be sent to DIS giving the following reference: Doc: No. CEO 30 ( 4978 ) AmendmeDts Issued SiDee PablleatloD Amend No. Date of Issue BURBAU OF INDIAN STANDARDS Text Affected Headquarters: Manak Bhavan, 9 Babadur Shah Zalar Marg, New Delhi 110002 Telephones: 331 01 31, 331 13 75 Regional Offices: Central: Manak Bhavan, 9 Bahadur Shah zafar Mars NEW DELHI 110002 Eastern: 1/14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola CALCUTTA 700054 Northern: SeQ 44S-446, Sector 3S-C, CHANDIGARH 160036 Southern: C. I. T. Campus, IV Cross Road, MADRAS 600113 Western: Manakalaya, B9 MIDC, Marol, Andheri ( East) BOMBAY 400093 Telegrams : Manaksanstha (Common to all Offices) Telephone { 331 01 31 331 13 75 { 37 84 99, 37 85 61 37 86 26, 37 86 62 { 53 38 43. S3 16 40 53 23 84 { 23S02 16, 23S 04 42 235 15 19, 235 23 l' { 632 92 95, 632 78 S8 632 78 91, 632 78 92 Branches: AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. OHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. PATNA. THIRUVANANTHAPURAM. PrlntOd at ParaloD Bnterprilu, Delhi. IDal.