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<p>Sandcrete blocks are mostly applied for the construction of both load and non-load-bearing walls for housing construction in Ghana. Their widespread use has led to excessive application of some of its component materials, especially sand, the dominant material in terms of volume – leading to high costs of producing the block unit with significant negative environmental impacts. This study is aimed at investigating the engineering properties of sandcrete block produced by replacing 0–50% of sand with sawdust by volume (vl%) with a 0.50 water-to-cement ratio and a cement-to-aggregate ratio of 1:10. Samples were cured for 28&#xa0;days and tested for compressive strength, density and water absorption. Density values decreased from 2743.42 to 2110.53&#xa0;kg/m<sup>3</sup> with increasing sawdust content (10–50%), while water absorption rates increased between 9.7 to 21.7%. Compressive strength at 28&#xa0;days for 10–50 vl% of the Raw Sawdust (RSD) replacement blocks ranged between 2.86 and 2.53 N/mm<sup>2</sup>, compared to the control sample which produced a strength of 3.28 N/mm<sup>2</sup>. Relative to the control’s characteristics, it was concluded that although the replacement of sand with sawdust produced sandcrete blocks that are lighter in weight, their engineering properties were found to be lower than the standard blocks. Notwithstanding, these blocks have potential application in the construction <b>o</b>f Sustainable Non-Load Bearing Wall (SNLW) structures such as internal partition wall systems in housing units in non-earthquake prone zones. This will contribute to the reduction of environmental degradation due to excessive sand winning and indiscriminate disposal of sawdust in the environment as well as producing cost-effective housing delivery.</p>

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Effect of partial replacement of sawdust with sand on the properties of sandcrete blocks for sustainable non-load bearing walls in Ghana

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月20日

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  • Kwadwo Adinkrah-Appiah,
  • Sampson Assiamah,
  • Stephen Agyeman

摘要

Sandcrete blocks are mostly applied for the construction of both load and non-load-bearing walls for housing construction in Ghana. Their widespread use has led to excessive application of some of its component materials, especially sand, the dominant material in terms of volume – leading to high costs of producing the block unit with significant negative environmental impacts. This study is aimed at investigating the engineering properties of sandcrete block produced by replacing 0–50% of sand with sawdust by volume (vl%) with a 0.50 water-to-cement ratio and a cement-to-aggregate ratio of 1:10. Samples were cured for 28 days and tested for compressive strength, density and water absorption. Density values decreased from 2743.42 to 2110.53 kg/m3 with increasing sawdust content (10–50%), while water absorption rates increased between 9.7 to 21.7%. Compressive strength at 28 days for 10–50 vl% of the Raw Sawdust (RSD) replacement blocks ranged between 2.86 and 2.53 N/mm2, compared to the control sample which produced a strength of 3.28 N/mm2. Relative to the control’s characteristics, it was concluded that although the replacement of sand with sawdust produced sandcrete blocks that are lighter in weight, their engineering properties were found to be lower than the standard blocks. Notwithstanding, these blocks have potential application in the construction of Sustainable Non-Load Bearing Wall (SNLW) structures such as internal partition wall systems in housing units in non-earthquake prone zones. This will contribute to the reduction of environmental degradation due to excessive sand winning and indiscriminate disposal of sawdust in the environment as well as producing cost-effective housing delivery.