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  1. publication
  2. Documents and publications

Hollow concrete blocks: production and use in earthquake affected districts


Documents and publications
Source
Housing Recovery and Reconstruction Platform
Publication Year
2018
Number of pages
24 p.

This report presents the findings of two rounds of HRRP data collection on the production and use of Hollow Concrete Blocks (HCBs) across the districts affected by the 25 April 2015 Gorkha earthquake. The Nepal Standard: 119/2042 provides the minimum requirements for HCBs in construction in Nepal. HCBs are pre-cast cement concrete blocks with one or more large holes and consist of Portland cement, water, sand and aggregates. HCBs have many properties which make them a popular construction material for housing in earthquake zones, including that they have a high compressive strength if prepared properly, and their light weight, due to the cavity, decreases the dead load. 

The objective of the two rounds of HRRP data collection was to analyse the production and use of Hollow Concrete Blocks (HCBs) across the earthquake affected districts. Interviews were conducted with 76 block producers across 11 districts, with compressive strength testing carried out on 110 blocks, and interviews with 37 households that have built with HCBs, across 5 districts.

The report concludes by suggesting a set of next steps which include continuing documentation of production and use of HCBs, developing a manual for HCB construction under the NRA Standardisation Committee for Reconstruction of Earthquake Resistant Houses, and developing and implementing support packages for HCB producers to improve quality of blocks.

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Related information
Related links
From code to practice: challenges for building code implementation and the further direction of housing earthquake safety
Words into Action guidelines: Build back better in recovery, rehabilitation and reconstruction (Consultative version)
More about the 2015 Nepal earthquake
Nepal earthquake 2015: Post disaster recovery framework
Link to HRRP Bulletins
Link to Common Feedback Project Reports
Link to HRRP District Reports
Keywords
Hazards
Earthquake
Themes
Disaster Risk Management
Recovery
Shelter / Housing
Structural Safety
Country & Region
Nepal

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