不同细度石粉对胶砂性能的影响及碳排放分析  

Effect of different fineness stone powder on the performance of rubber sand and carbon emission analysis

作　　者：苏维维 任龙芳 夏京亮 赫海平 王晶 冷发光 刘文生 SU Weiwei;REN Longfang;XIA Jingliang;HAO Haiping;WANG Jing;LENG Faguang;LIU Wensheng(Pingliang New Century Building Materials Co.,Ltd.,Pingliang 744024,China;China Academy of Building Research,Beijing 100013,China)

机构地区：[1]平凉市新世纪建材有限责任公司,甘肃平凉744024 [2]中国建筑科学研究院有限公司,北京100013

出　　处：《混凝土》2024年第7期153-155,159,共4页Concrete

基　　金：平凉市科技计划项目(PL-STK-2023A-005);甘肃省重点研发计划项目(22YF7GL215)。

摘　　要：为实现平凉地区石灰石粉的高效资源化利用,探明不同细度石灰石粉对水泥基材料性能的影响,对平凉地区的机制砂石粉进行粉磨得到不同细度的石灰石粉,将不同细度的石粉以不同比例等质量取代水泥,对比研究石粉粒径、石粉掺量等对胶砂性能的影响,并基于碳排放计算标准计算分析了利用石粉制备混凝土带来的碳减排效益。结果表明:石灰石粉替代水泥可缩短胶砂凝结时间;随石粉掺量增加,胶砂流动度逐渐下降,抗压强度逐渐减小;石粉比表面积是水泥比表面积的1.5倍时,胶砂的流动性较好,石粉细度变细有利于胶砂抗压强度的增加;石灰石粉替代水泥可有效降低混凝土碳排放,不同强度等级的混凝土碳减排百分比与其掺量大致相等。In order to achieve efficient resource utilization of stone powder in Pingliang area and explore the influence of diferent fine-ness of limestone powder on the properties of cementitious materials.It grinds the mechanism sand and stone powder in Pingliang area to obtain different fineness of limestone powder.Different fineness of limestone powder is replaced with cement in different proportions and masses,and the effects of stone powder particle size,stone powder dosage,etc.on the performance of mortar are compared and studied.Based on carbon emission calculation standards,the carbon emission reduction benefits of using stone powder to prepare concrete are cal-culated and analyzed.The results show that replacing cement with stone powder can shorten the setting time of the mortar.As the amount of stone powder increases,the flowability of the mortar gradually decreases and the compressive strength gradually decreases.When the spe-cific surface area of stone powder is 1.5 times that of cement,the flowability of the mortar is better,and the fineness of stone powder is beneficial for the increase of the compressive strength of the mortar.Replacing cement with limestone powder can effectively reduce car-bon emissions from concrete,and the carbon reduction percentage of concrete with different strength grades is roughly equal to its dosage.

关 键 词：石灰石粉 胶砂 细度 流动度 碳排放 

分 类 号：TU528.041[建筑科学—建筑技术科学]