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首页> 外文期刊>Journal of Materials Science and Chemical Engineering >Density and Strength of Mortar Made with the Mixture of Wood Ash, Crushed Gneiss and River Sand as Fine Aggregate
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Density and Strength of Mortar Made with the Mixture of Wood Ash, Crushed Gneiss and River Sand as Fine Aggregate

机译：以木灰，碎片麻岩和河砂为细骨料的混合物制成的砂浆的密度和强度

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摘要

The main purpose of this paper is to study the feasibility of using wood bottom ash to partially replace natural fine aggregate or crushed gneiss sand in the manufacturing of mortars. The experiment uses wood ash as fine aggregates, which passes through 5 mm sieve, in proportions of 5%, 10%, 15%, 20% and 25% by weight to replace partially river sand and crushed gneiss, and the both sand of the same size as the aggregate respectively. Experimental results show that density of mortar and the compressive strength of mortar decrease globally with the increase in wood ash content. At 56 days, and for all replacements with wood ash, compressive strengths values of mortar obtained with the mixture of wood ash and river sand is greater than 20 MPa, which is not the case for mortar made with crushed gneiss and wood ash. Moreover, for 5% of replacement with wood ash, compressive strengths of mortar obtained with the mixture of wood ash and river sand and the mixture of wood ash and crushed gneiss are respectively 37 MPa and 32 MPa at 56 days. These values satisfied the strength requirements. Hence, 5% replacement of crushed gneiss with wood ash is suggested and could be benefit for mortar. In addition, the replacement of sand by wood ash is preferable with river sand which contains fewer fines than crushed gneiss. The compressive strength of mortar with 25% wood ash + river sand could be suitable.
机译：本文的主要目的是研究在制造砂浆中使用木底灰部分替代天然细骨料或片麻岩碎石的可行性。实验使用木灰作为细骨料，以5％，10％，15％，20％和25％的重量比通过5毫米的筛子，以部分代替河砂和碎片麻岩，以及分别与集合大小相同。实验结果表明，随着木灰含量的增加，砂浆的密度和砂浆的抗压强度总体下降。在第56天，对于所有用木灰替代的材料，用木灰和河砂的混合物制得的砂浆的抗压强度值均大于20 MPa，而用片麻片和木灰制成的砂浆则不是这种情况。此外，对于用木灰代替5％，在56天时用木灰和河砂的混合物以及木灰和碎片麻岩的混合物获得的砂浆的抗压强度分别为37MPa和32MPa。这些值满足强度要求。因此，建议用木灰代替破碎的片麻岩5％，这可能对砂浆有利。另外，最好用河粉砂代替木屑代替细碎片麻岩。 25％木灰+河砂的砂浆抗压强度可能是合适的。

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