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Effects of CaCl2 and NaCl on strength and sorption properties of cement-bonded rattan composite panels

机译：CaCl2和NaCl对水泥胶藤复合板强度和吸附性能的影响

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The aim of this study was to compare the effects of calcium chloride (CaCl2) and sodium chloride(NaCl) as accelerators on the strength and sorption properties of cement-bonded composites produced fromhammer-milled rattan cane (Laccosperma secundiflorum) fibre particles. 150x150mm composite boardswere manufactured at cement: rattan ratios of 4:1, 4.5:1 and 5:1 at a target density of 1000kg/m3. Onlybending strength, water absorption and thickness swelling properties were evaluated. Addition of CaCl2 andNaCl improved board properties to varying degrees, depending on cement-rattan mixing ratio and saltconcentration. Both accelerators enhanced the Modulus of rupture (MOR) of the composites particularly at4% concentration. However, the MOR of the samples treated with 4% CaCl2 were higher (4.4 – 6.91MPa)than those of the samples treated with 4% NaCl (2.54 - 3.65MPa). Water absorption by the untreatedsamples at 24 hours (36.7% - 46%) was reduced by both CaCl2 (24.1 – 36.3%) and NaCl (30.6 – 38.7%).The thickness swelling (TS) of all composites at 24 hours, except for samples produced with cement-rattanratio of 4.5 to 1 and 2% NaCl, fell within acceptable limit (<2%). It was concluded that NaCl at 4%concentration is a possible substitute for CaCl2 in cement-bonded rattan composite manufacture.
机译：这项研究的目的是比较氯化钙（CaCl2）和氯化钠（NaCl）作为促进剂对锤磨藤条藤茎（Laccosperma secundiflorum）纤维颗粒制成的水泥粘结复合材料的强度和吸附性能的影响。 150x150mm的复合板以水泥：藤制比例4：1、4.5：1和5：1进行生产，目标密度为1000kg / m3。仅评估弯曲强度，吸水率和厚度膨胀特性。 CaCl2和NaCl的添加在不同程度上改善了板的性能，具体取决于水泥-藤制混合比和盐浓度。两种促进剂都提高了复合材料的断裂模量（MOR），特别是在浓度为4％时。但是，用4％CaCl2处理的样品的MOR（4.4 – 6.91MPa）比用4％NaCl处理的样品（2.54-3.65MPa）高。 CaCl2（24.1 – 36.3％）和NaCl（30.6 – 38.7％）降低了未经处理的样品在24小时的吸水率（36.7％-46％）。除24小时外，所有复合材料的厚度膨胀率（TS）水泥比重比为4.5到1和2％NaCl制成的样品落在可接受的范围内（<2％）。结论是，在水泥粘结的藤条复合材料生产中，浓度为4％的NaCl可能替代CaCl2。

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