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Low Strength masonry debris as a construction material: a concept of green reconstruction
Naresh Nidal

Last modified: 2017-08-22


Debris Blocks are manufactured by compacting wetted mixture of low strength masonry debris consisting of soil and stone bats, sand and stabilizer in a mould into a compacted block. This paper focuses on issues pertaining to the strength of the debris blocks using three different proportion of cement as a stabilizer and test results were compared between two different curing techniques of debris block. Comprehensive study of two different debris soil characteristic and influence on the compressive strength of debris block was outlined. Experimental investigation was undertaken to know the parameters affecting compressive strength of debris block. Experimental study on compressive strength and share strength of debris block masonry using two different proportion of lime mortar was carried out. Experimental results are compared with existing provisions.


Compressive strength of debris block was found to be highly dependent on the compacting pressure, cement content and curing technique of debris block. Dry compressive strength of block increased by 30% in average by plastic wrapped curing technique. Water absorption capacity of block decreased by 80% with increase in compacting pressure per layer in three layers.


Average compressive strength and shear strength of debris block masonry increases with increase in mortar strength. The failure pattern of debris block masonry was similar with the failure pattern of normal burnt clay brick masonry and other concrete block masonry. Increase in mortar strength and manual groove in block units shows failure with development of shear cracks.

Key words: stabilized debris block, masonry, compressive strength, shear strength, plastic wrapped curing

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