IS 2185:1999 Part 2 is the Indian Standard (BIS) for concrete masonry units - specifications: part 2 lightweight concrete blocks. This standard specifies the dimensions, manufacturing requirements, and physical performance criteria for hollow and solid lightweight concrete blocks made from lightweight aggregates. It details testing methods for density, compressive strength, drying shrinkage, and water absorption to ensure quality in masonry construction.
Specifies requirements for lightweight concrete blocks used in masonry construction.
Overview
- Status
- Current
- Usage level
- Frequently Used
- Domain
- Materials Science — Masonry and Bricks
- Type
- Specification
Also on InfraLens for IS 2185
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Do not confuse Part 2 (lightweight aggregate blocks) with Part 3 (Autoclaved Aerated Concrete - AAC blocks); they have different densities and testing protocols.
! Ensure blocks are adequately cured and thoroughly dried before use in masonry to minimize drying shrinkage and subsequent wall cracking.
! Due to higher porosity, lightweight blocks may absorb water from the mortar rapidly; pre-wetting or using specific mortar consistencies is highly recommended.
Frequently referenced clauses
lightweight concretemasonrylightweight aggregatecement
International Equivalents
🌐
International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values6
Quick Reference Values
maximum block density1500 kg/m³
maximum water absorption20% by mass
maximum drying shrinkage0.08%
maximum moisture movement0.09%
tolerance length± 5 mm
tolerance height and width± 3 mm
Tables & Referenced Sections
Key Tables
Table 1 - Nominal Dimensions of Blocks
Table 2 - Physical Requirements of Lightweight Concrete Blocks
Key Clauses
Clause 4 - Dimensions and Tolerances
Clause 5 - Classification
Clause 6 - Physical Requirements
Clause 9 - Sampling and Criteria for Conformity
Annex C - Method for the Determination of Block Density
Annex D - Method for the Determination of Compressive Strength
Frequently Asked Questions3
What is the maximum allowed density for lightweight concrete blocks under this code?+
The maximum block density allowed is 1500 kg/m³.
What is the permissible water absorption limit?+
Water absorption should not exceed 20 percent by mass.
What are the standard dimensional tolerances for these blocks?+
The tolerances are ± 5 mm for length, and ± 3 mm for both height and width.
QA/QC Inspection Templates
📋
QA/QC templates coming soon for this code.