对葡萄藤材和水泥混合物的水化特性进行了分析研究,考察了葡萄藤材作为水泥复合板原料的可行性。将藤粉、水泥和水按一定比例均匀混合,并用自制的测温装置测定混合物的水化温度曲线,然后计算葡萄藤材对水泥的阻凝系数及适合系数,以此评定葡萄藤材与水泥的相适性。结果表明:葡萄藤材的糖类抽提物对水泥水化有抑制作用,不能直接作为水泥复合板的原材料; 加入CaCl2后能够显著改善这一状况,但仍无法满足生产所需; 对葡萄藤材分别进行冷水、热水和化学浸提预处理并添加CaCl2,可进一步改善葡萄藤材与水泥的相适性,预处理作用效果为:1% NaOH最佳,热水次之,冷水最差。
Abstract
The hydration characteristics of the mixture of grapevine and cement was investigated, and the possibility of using grapevine as the starting material for floor slab preparation was examined. The compatibility between grapevine and cement was assessed by mixing 15 g grapevine powder with 200 g cement and 90.5 g water, and protracting the curve of hydrating temperature and time with the self-made temperature measurement instrument. The results showed that grapevine could not be used directly in cement composite boards because of its high inhibition. Additives such as CaCl2 could improve its compatibility to cement. Compatibility of grapevine and cement was further improved after pretreatments of grapevine. The order of effectiveness were cold water<hot water<1% NaOH. It is suitable for the production of half-dry cement composite boards when together with additives.
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基金
收稿日期:2011-12-02 修回日期:2012-04-10 基金项目:国家自然科学基金项目(30901132) 第一作者:马欣欣,硕士生。*通信作者:王传贵,教授。E-mail:nj230036@163.com。引文格式:马欣欣,王传贵. 葡萄藤材和水泥混合物的水化特性[J]. 南京林业大学学报:自然科学版,2012,36(3):157-159.
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