摘要
为探究不同来源沙漠砂的性能差异及其对混凝土的影响,对典型沙漠地区沙漠砂的物理性质、颗粒级配特征、表观形貌、元素成分、矿物组成以及化学性质等进行了全面的测试,并分析研究了沙漠砂作为混凝土细骨料的应用关键技术。结果表明:沙漠砂颗粒细小、表面光滑、粒度分布范围较窄,细度模数大部分在0.5~1.0之间;沙漠砂的吸水率、含泥量和矿物组成等具有很强的地域性,但空隙率普遍较大,均超过了44%;沙漠砂的比表面积和颗粒粒径等因素会影响混凝土的强度形成过程;细颗粒多的沙漠砂中,硫化物和硫酸盐的存在会提高混凝土的强度;当混合砂细度模数相同时,沙漠砂的吸水率为混凝土强度的主要影响因素。
The physical properties,particle gradation characteristics,apparent morphology,elemental and mineral composition,and chemical properties of desert sand(DS)in typical desert areas were thoroughly tested,and the key application technologies of DS as concrete fine aggregate were analyzed and studied in order to explore the performance differences of DS from different sources and its influence on concrete.According to the findings,the surface of DS is smooth,the particle size distribution range is constrained,the particles are also fine,and the fineness modulus is primarily between 0.5 and 1.0.The water absorption,mud content and mineral composition of DS have strong regional characteristics,but the voidage ratio is generally larger,more than 44%.The specific surface area and particle size of desert sand will affect the formation process of concrete strength.The presence of sulfides and sulfates in fine DS will increase the strength of concrete.When the mixed sand fineness modulus is the same,the water absorption rate of DS is the main factor affecting the concrete strength.
作者
牛景行
王智
潘舟洋
王缘
姜林伯
陈海艳
NIU Jinghang;WANG Zhi;PAN Zhouyang;WANG Yuan;JIANG Linbo;CHEN Haiyan(College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China;College of Water Conservancy and Architecture Engineering,Shihezi University,Shihezi,Xinjiang 832003,China)
出处
《石河子大学学报（自然科学版）》
CAS
北大核心
2024年第1期55-61,共7页
Journal of Shihezi University(Natural Science)
基金
国家自然科学基金(52268034)
重庆市自然科学基金(CSTB2022NSCQ-MSX0647)
国家级大学生创新训练(202210759043)。
关键词
沙漠砂
物理化学性质
对比分析
混凝土
强度
desert sand
physicochemical properties
comparative analysis
concrete
strength
