Interlocking in Mud Blocks for Improved Flexural Strength and Earth Quake Resistance

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Interlocking In Mud Blocks For Improved Flexural Strength And Earth Quake Resistance

Interlocking in Mud Blocks for Improved Flexural Strength and Earth Quake Resistance

Abstract

Interlocking Compressed Earth Blocks (ICEBs) are a form of dry stack masonry units, which can be manufactured by inexperienced labourers using predominantly low cost materials. This paper presents results from a testing program investigating flexure-dominated ICEB walls. Four 1.8-m high ICEB walls were constructed and tested under in-plane cyclic loading.

The specimens were varied to identify the effects of heightto-width aspect ratio, presence of a flange at one end of the wall, and presence of an opening in the wall on performance of the system. Testing results show that flexure-dominated ICEB walls can exhibit stable hysteretic behaviour until a ductile failure occurs. Furthermore, the strength of the wall can be enhanced due to the presence of a flange at one end and will be reduced due to the presence of an opening.

Conclusion

Four large scale flexure-dominated ICEB walls were constructed and subjected to in-plane cyclic loading to experimentally address their seismic performance. Variations in the tested specimens allowed investigation of the effects of the wall height-to-width aspect ratio, presence of a flange at one end of the wall, and presence of an opening at the centre of the wall on seismic performance of the system. Testing results show that flexure-dominated ICEB walls can exhibit ductile behaviour and stable hysteretic energy dissipation capacities under in-plane cyclic loads.