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Influence of sand grading on the characteristics of mortars and soil-cement block masonry

機(jī)譯：砂度對(duì)砂漿和水泥土砌塊特性的影響

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Sand constitutes bulk of the mortar volume. Sand grading can influence the characteristics of mortar and masonry. Influence of sand grading on the characteristics of two types of mortars and soil-cement block masonry are examined in this paper. Three different sand gradings were used to examine the workability, strength, water retentivity, drying shrinkage and stress-strain characteristics of cement mortar and cement-lime mortar. Bond strength, compressive strength and stress-strain characteristics of soil-cement block masonry were also examined using these mortars. Major findings of the study are: (a) for a given consistency mortar with fine sand requires 25-30% more water, (b) as the sand becomes fine mortar compressive strength and modulus decreases while drying shrinkage increases, (c) fine sand reduces the tensile bond strength of masonry, whereas masonry compressive strength is not sensitive to sand grading variations and (d) masonry modulus reduces as the sand used in the mortar becomes finer.
機(jī)譯：砂占砂漿體積的大部分。砂的分級(jí)會(huì)影響砂漿和磚石的特性。本文研究了砂礫分級(jí)對(duì)兩種類型砂漿和水泥土砌塊特性的影響。使用三種不同的砂級(jí)來(lái)檢查水泥砂漿和水泥石灰砂漿的可加工性，強(qiáng)度，保水性，干燥收縮率和應(yīng)力應(yīng)變特性。還使用這些砂漿檢查了水泥土砌塊砌體的粘結(jié)強(qiáng)度，抗壓強(qiáng)度和應(yīng)力應(yīng)變特性。該研究的主要發(fā)現(xiàn)是：（a）對(duì)于給定稠度的細(xì)砂漿砂漿，需要多加25-30％的水；（b）隨著砂變得細(xì)砂漿，抗壓強(qiáng)度和模量下降，而干燥收縮率增加；（c）細(xì)砂漿降低了砌體的抗拉強(qiáng)度，而砌體的抗壓強(qiáng)度對(duì)砂度變化不敏感，并且（d）隨著砂漿中使用的砂變得更細(xì)，砌體模量降低。

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