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Evaluation of Lime Treated Mixed Sawdust as Fractional Replacement for Sand in the Production of Sandcrete Hollow Blocks

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
The study investigated sawdust as an inclusion in producing sandcrete blocks which are required for internal wall partitions of high rise building. Large volumes of sawdust which are generated by sawmill activities causes’ environmental menace but may serve as an inclusion to sandcrete production. The blocks were produced with cement, sand and sawdust at constant mixing ratio of 1:8 respectively. The sand sawdust were varied in volume proportion of 100:0%, 98:2%, 96:4%, 94:6%, and 92:8% respectively while cement was kept constant throughout the mixture. The properties tested were density, water absorption, and compressive strength of the blocks carried out using the compression testing machine after 28 days of curing period. Water absorption test carried out showed that the sandcrete blocks produced from 100% sand and cement showed the least absorption of 8.6% while 92% sand replacement had the highest absorption of 11.27%. The density values obtained showed that 92% sand replacement has the least density at 1083kg/m3 and the highest value was observed at 0% sawdust replacement level at 1385kg/m3. The compressive strength for the replacement at 2.95 and 3.4N/mm2 which are within the standard values of 2.5N/mm2 and 3.45N/mm2 in the Nigeria Industrial Standard (NIS 87, 2000) while 96 to 4% sawdust showed 0.81 to 1.08N/mm2 which are far below the specified value. However, blocks produced with sawdust inclusion could be suitable for construction where light weight is of utmost importance as it can reduce the weight on the building foundation. Incorporating sawdust into sandcrete block production in certain proportion could help to produce light density and thermal insulating material required for comfort in building.
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REFERENCES

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