10049.pdf

( Reaffirmed 1998 )

IS : loo49 - 1981

Indian Standard CODE OF PRACTICE FOR MANUFACTURE LIME BASED BLOCKS Building

Limes

SectionaI

Committee,

BDC

OF

4

Representing

Chairman

Engineering Research Laboratories, of Andhra Pradesh, Hyderabad

DR IQBAL ALI

Government

Members Engineer-in-Chief’s Branch, Ministry of Defence SHRI V. S. AQARWALA SHRI T. SUDHAKAR ( Alternate ) SHRI SRIDHAX BANDYOPaDHYAY Khadi & Village Industries Commission, Bombay SHRI E. RAMACHANDRAN ( Alternate ) NationaI Test House, Calcutta SHR~ S. K. BANERJEE SHRI D. K. KANUNGO ( Alternate ) Cement Research Institute of India, New Delhi DR S. K. CHOPIZA Department of Mines and Geology, Government SHRI Y. N. DAVE of Rajasthan, Udaipur SHRI R. G. GARB ( Alternate ) Land Reclamation, Irrigation & Power Research DIRECTOR Institute, Punjab, Amritsar RESEARCH OFFICER ( B & M ) ( Alternate ) Public Works Department, Government of Gujarat DIRECTOR, GERI, VADODARA OFFICER RESEARCH ( MATERI_4~ T E s T I N a DIVISION ) ( Alternate ) Irrigation and Power Department, Government of DIRECTOR, MERI, NASIK Maharashtra OFFICER RESEARCH TESTING ( MATERIAL DIVISION ), MERI ( Alternate ) Central Road Research Institute ( CSIR ), New Dn R. K. Gnosn Delhi SHRI M. L. B~ATIA ( Alternate ) Ra,jasthan Housing Board, Jaipur HOUSING COMMISSIONER Cent;;abor~euetldmg Research Institute ( CSIR ), DR IRSHAD MASOOD SHRI S. P. G_anG ( Alternate )

( Continued on pa‘ce 2 )

INDIAN

@ Copyright 1982 STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

IS:10049 - 1981 ( Continued from

page1 )

Members

Representing

DIRECTOR RESEARCH Ministry of Railways JOINT ( B & S ), RDSO ASSISTANT DIRECTOR RESEARCH ( B & S), RDSO ( Alternate ) Dyer’s Stone Co Pvt Ltd, Delhi SHRI N. MACEDO SHRI H. L. MARWAH Builder’s Association of India, Bombay SHRI HARISH C. Konr,~ ( Alternate ) DR S. C. MOUDGAL Department of Science & Technology, New Delhi National Buildings Organization, New Delhi DR A. V. R. Rao SHRIJ. SEN GUPTA ( Alternate ) Lime Manufacturers Association of India, New REPRESENTATIVE Delhi SUPERINTENDING ENQINEER (W) Public Works Department, Government of Madhya Pradesh, Bhopal SHRI R. N. KHANNA ( Alternate ) SUPERINTENDING ENGINEER Public Works Department, Government of Tamil ( PLG & DESIQN ) Nadu, Madras EXECUTIVE ENGINEER ( BUILDINGS CENTRE DIVISION ) ( Alternate ) SRRI SIJRAJ S. J. BAHADUR Housing and Urban Development Corporation, New Delhi SRRI G. RAMAN, Director General, IS1 ( Ex-ojicio Member ) Director ( Civ Engg ) Secretary SHRT RAVINDER KUMAR Assistant Director ( Civ Engg ), ISI

2

IS:10049- 1981

Indian Standard CODE OF PRACTICE FOR MANUFACTURE LIME BASED BLOCKS

0.

OF

FOREWORD

0.1This Indian Standard was adopted by the Indian Standards Institution on 24 December 1981, after the draft finalized by the Building Limes Sectional Committee had, been approved by the Civil Engineering Division Council. 0.2 Lime based blocks are being used on a limited scale for the construction of walls, internal partitions and filler walls in place of traditional clay building bricks, particularly for low cost housing. These blocks are normally made from lime, lime and cement, lime and pozzolana or lime-pozzolana mixture. These blocks being light in weight ensure rapid construction, help in saving of mortar, and the surfaces being smooth do not need plastering. The specification of these blocks has been This standard whi.ch is an essential adjunct covered in IS : 3115-1978”. to the above specification is intended to provide guidance with respect to the manufacture of such blocks making use of lime, pozzolana, cement and aggregates as chief constituents. While preparing this standard assistance has been derived from Central Road Research Institute, New Delhi. 0.3 For the purpose of deciding this standard is complied with, expressing the result of a test or dance with IS : 2-19607. The the rounded off value should be in this standard.

1.SCOPE 1.1This standard

method

lays down of manufacture, curing

*Specification for lime based blocks $Rulcs

for rounding

off numerical

whether the final analysis, number the same

a particular requirement of value, observed or calculated, shall be rounded off in accorof significant places retained in as that of the specified value

the requirements regarding materials, and finishing of lime based blocks. (Jir~t reuision ). values ( wised ).

3

IS : 10049 - 1981 2. TERMINOLOGY 2.1 For the purpose of this standard, 1978* and IS : 6508-19727 shall apply.

the definitions

given in IS : 3115-

3. MATERIALS 3.1 Lime 1973:.

-

This

shall conform

3.2 Cement - This shall 197611 or IS : 1489-1976~. 3.3

to Class C ( dry hydrated

conform

to

either

) of IS : 712-

IS : 269-19765,

IS : 4.55

Pozzolana

3.3.1

Burnt

3.3.2

Fly Ash -

This

Clay Po~+pdana This

3.4 Lime-Pozzolana 1967:;.

shall conform Mixture

-

shall conform

to IS : !344-1968**.

to IS : 3812-1981tf. This

shall

conform

to

IS : 4098-

3.5 Coarse Aggregate - Shall be either natura1 or crushed stone conor broken brick ( burnt clay ) aggregates forming to IS : 383-1970@ conforming to IS : 306%1975///l. 3.6 Cinder Aggregate - This shall conform the maximum size shall not exceed 20 mm. 3.7 Fine Aggregate

-

This

shall conform

to IS : 2686-1977ql

and

to IS : 383-1970&.

amount of de3.8 Water - Shall be clean and free from injurious leterious matter. Potable water is generally considered satisfactory. 3.8.1

ThepH

value of water shall generally

be not less than 6.

*Specification for lime based blocks ( jint reoisiott). tGlossary of terms relating to building lime. tspecification for building limes ( second revision ). §Specification for ordinary and low heat Portland cement ( third revision ). [ISpecification for Portland slag cement ( third revision ), BSpecification for Portland-pozzolana cement ( second revision ). **Specification for burnt clay pozzolana ( jrst rmision ). $tSpecification for fly ash for use as pozzolana and admixtnre (first revision ). $$Specifi,cation for lime-pozzolana mixture. @Specification for coarse and fine aggregates from natural sources for concrete

( second rmision ) . (II/Specification

for broken brick ( burnt clay ) coarse aggregate for use in lime concrete. OnSpecification for cinder aggregates for use in lime concrete (jut revision ). 4

IS : 10049 - 1981 4. MIX

PROPORTION

4.0 The mix shall of IS : 3115-1978”.

be so designed

that

the blocks

meet the requirement Blocks - The for the manu-

Proportion for Lime-Pozzolana 4.1 Mix recommended &ix proportions of lime pozzolana concrete facture of lime-pozzolana blocks are given in Table 1. TABLE

1

RECOMMENDED

c--

-

Lime Pozzolana Mixture

(1) 1.

(2)

PROPORTIONS

&‘bX PROPORTION _-_-_~-__h____-_---.--_

Lime

Pozzo-

lana

RY WEIUHT

Fine Aggregate ( E: Cinder Aggrcgate )

COZUX?

Aggregate ( Other than Cinder Aggregate )

water

llequirement by Weight of Total Material ( Percent )

(3)

(4)

(5)

1

-

-

2

11

1

-

-

4

10

(6)

(7)

(8)

Using Lime-Pozzog;zdiixture of LP 20 LP 40

2.

MIX

Using Lime and POZZ0l~Et Separately: Lime reactivity 40 k&cm2 (4N/mm*)

1

2

6

11

Lime reactivity 80 kg-f/cm2 ( 8 N/mm2 )

1

2

12

10

4.2 Mix Proportion for Lime-Cement Blocks mix proportion for manufacture of lime-cement ( lime, cement, cinder aggregate by volume ).

-

The recommended blocks is 1.3 : 1 : 18

4.2.1 Water in just sufficient quantity shall be added to maintain the working consistency, but at the same time it shall not be excessive leading to segregation of aggregates from the cementitious material. *Specification for lime based blocks (jirst revision). 5

1

IS:10049

- 1981

5. MIXING 5.1 Mixing 5.2 Mixing

AND

MOULDING

.

shall be done in a mechanical for Lime-PozzoIana

mixer.

Blocks

5.2.1 Saturated surface dry coarse aggregate shall first be fed into the mechanical mixer. The required quantities of sand and lime-pozzolana mixture or lime and pozzolana separately shall then be added to the mixer. Part of the water shall then be added and the contents mixed. The remaining quantity of water shall then be finally added and the contents shall be mixed well. The total time of mixing shall not be less than 2 minutes and shall be sufficient to ensure uniform mixing. 5.3 Mixing

for Lime-Cement

Blocks

5.3.1 Cement and well soaked cinder aggregates in the required proportion shall be mixed dry in the mixer. Lime putty mixed in water shall then be passed into the mixer and mixed until a well mixed concrete of uniform appearance is obtained. The quantity of water added to lime putty shall be slightly less than the required quantity. The use of excess water impairs the strength of the block and it should be ensured that no water shall flow out of the block during compacting and only a thin film of water shall appear at the surface after compaction. 5.4 In a mechanically or electrically operated machine, the mould for the blocks shall be filled up with the mix by providing a surcharge of about 20 percent above the top level of the mould. It shall be vibrated or mechanically tamped and struck off level. 5.5 In the case of hand-operated machine, the mix shall be placed into the mould in layers of about 50 to 70 mm and each layer thoroughly tamped with suitable tamper until the whole mould is filled up and struck off level with a trowel. 6. DRYING 6.1 Immediately after the block is prepared as per 5.4 and 5.5 it shall be released from the mould and removed along with the base plate to a The shed shall be such as to provide protection against covered shed. sun, strong wind and rain. The blocks shall be stored in the shed until these are sufficiently hardened to permit handling without damage. But in no case shall the period be less than 96 h in the case of lime-pozzolana blocks and 18 h in the case of lime-cement blocks. 7. CURING 7.1 The blocks after drying for 96 h in the case of lime-pozzolana blocks and 18 h in the case of lime-cement blocks shall be stacked, suitably covered and shall be kept moist by spraying with water at regular The curing period shall not be less than 28 days. intervals. 6

AMENDMENT

NO. 1 DECEMBER 1994 TO IS 10049 : 1981 CODE OF PRACTICE FOR MANUFACTURE OF LIME BASED BLOCKS (Page 4, clause 2.1) - Substitute ‘IS 3115 : 1992*‘for and ‘IS 6508 : 198St’for‘IS : 6508 - 1972j”. (Page 4, clause 3.1) -Substitute (Page

4, clause 3.2 ) -

‘IS 712 :

‘IS : 3115 - 1978*’

1984z’for‘IS

: 712 - 1973$‘.

Substitute the existing for the following:

‘Cement - This shall conform to either IS 269 : 19896, IS 1489 (Part 1) : 1991li or IS 1489 (Part 2) : 1991%’ (Page 4, sub-clause 3.3.1 ) -Substitute

the existing for the following:

shall conform to IS 1344 : 1981**.’

‘3.3.1 Calcined Cfay Pozwluna

-This

( Page 4, clause 3.4 ) 1967$$‘.

Substitute

‘IS 4098 : 1983$$’ for ‘IS : 4098 -

( Page 4, clulcse 3.5 ) 19751111’.

Substitute

‘IS 3068 : 19861111’for ‘IS : 3068 -

( Page 4, clause 3.8 ) -

Substitute the existing for the following:

“3.8 Water - It shall be clean and free from hamrful amount of deleterious materials. For the limits of deleterious material pemritted in the water, reference may be made to IS 456 : 1978 ‘Code of practice for plain and reinforced concrete.( third revision )‘. Potable water is generally considered satisfactory.” marks) (Page 4, foot-notes witlt ‘*‘, ‘p’, ‘$‘, ‘$‘, ‘¶‘, ‘**‘, ‘$$’ and ‘1111’ Substitute the following for the existing: ‘ *Specification for lime based blocks ( second revision ). ~Clossary of terms relating to building lime (first ret&ion ). $Specification

for building limes ( third revision ).

$SpecXication for 33 grade ordinary portland cement (fourth revision). Bpecification

for Portland-pczolana

Part 1 Flyash based ( r&d r&.&t

cement: ).

Part 2 Calcined day based (third revkim). **Specification

for calcined clay pozzolana ( second revision ).

$*Specification

for lime-pozzolana

mixture (first fevision).

~~~~Specificationfor broken brick (burnt clay) coatse aggregates for use in lime concrete ( second revision ).’

(CED 4) Reprography Unit, BE, New Delhi, India

AMENDMENT

NO. 2 DECEMBER 1999 TO IS 10049 : 1981 CODE OF PRACTICE FOR MANUFACTURE OF LIME BASED BLOCKS ( Page 3, clause 0.2 ) 1978*‘.

Substitute

( Page 3, footnote marked * ) footnote: ‘*Specification

Substitute

the following

‘IS : 3115 -

for the existing

for lime based blocks ( second revision).’

(Page 5, clause 4.0 ) ‘4.0 The mix shall be so IS 3115: 1992*‘. (Page 5, footnote ) ‘*Specification

‘IS 3115 : 1992*’ for

Substitute designed

Substitute

for lime based blocks (second

the following

for the existing

clause:

that the blocks meet the requirement the following

for the existing

of

footnote:

revision)‘.

(CED04)

Reprography

Unit, BIS, New Delhi, India