Physicochemical properties of desert sand and their effects on concrete strength
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.
NETL
NSTL
万方数据
