摘要
硫酸法制钛白粉会产生大量黄石膏废料,黄石膏废料的堆积会对土地和水资源造成污染,但我国每年的黄石膏利用率不到10%,针对黄石膏回收利用问题,本文通过研究以黄石膏替代水泥基浆液通过与氯镁凝胶复合以双氧水(H_(2)O_(2))作为发泡剂在低温碱性环境下进行发泡,针对产物进行黄石膏掺加量与抗压强度的实验以及混凝土材料的发泡温度与材料导热系数与孔隙率关系实验。实验发现,在黄石膏掺加量小于等于35%时材料的抗压强度大于对照组的抗压强度,且在掺加量为10%时抗压强度最大为62.87MPa,同时低温发泡环境下混凝土导热系数较常温发泡的对照组较低且孔隙率较对照组较高,耐热性能良好。经过以上实验发现通过低温发泡技术以黄石膏替代部分水泥基制成的混凝土可以作为耐热材料或是抗压性能较好的材料用于建筑领域,对解决工业废料黄石膏的问题具有一定的参考意义。
Sulfuric acid method of titanium dioxide will produce a large amount of yellow gypsum waste,a large number of yellow gypsum will cause a lot of pollution to land and water,but the annual utilization rate of yellow gypsum in China is less than 10%,in view of the recycling of yellow gypsum,this paper studies the replacement of cement-based slurry with yellow gypsum and hydrogen peroxide(H2O2)as the foaming agent in a low-temperature alkaline environment through the study of yellow gypsum instead of cement-based slurry by compounding with magnesium chloride gel.According to the experiments on the dosage and compressive strength of Gypsum and the relationship between the foaming temperature of concrete and the thermal conductivity and porosity of the material,it was found that the compressive strength of the material was greater than that of the control group when the dosage of Gypsum was less than or equal to 35%,and the maximum compressive strength was 62.87MPa when the dosage was 10%,and the thermal conductivity of concrete in the low-temperature foaming environment was lower than that of the control group and the porosity was higher than that of the control group,and the heat resistance was good.After the above experiments,it is found that the concrete made of yellow gypsum can be used as a heat-resistant material or a material with good compressive performance in the construction field through low-temperature foaming technology,which has certain reference significance for solving the problem of industrial waste yellow gypsum.
作者
罗述祯
杨波
孔敏杰
胡晋瑞
刘炳臣
胡能虎
刘兵
董玉峰
LUO Shu-zhen;YANG Bo;KONG Min-jie;HU Jin-rui;LIU Bing-chen;HU Neng-hu;LIU Bing;DONG Yu-feng(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Henan Huatong Chemical Co.,Ltd.,Xinyang 465200,China;China Coal Research Institute,Beijing 100013,China;Qianyuan Construction Group Co.,Ltd.,Jiaozuo 454150,China)
出处
《价值工程》
2025年第26期33-35,共3页
Value Engineering
关键词
黄石膏
冷水发泡
抗压强度
固废新生
yellow gypsum
foaming in cold water
compressive strength
solid waste is renewed
