Basic Properties of Concrete Incorporating Recycled Ceramic Aggregate and Ultra-fine Sand

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 30; no. 2; pp. 352 - 360
• Main Author: 刘凤利 LIU Junhua 马保国 HUANG Jian LI Hainan
• Format: Journal Article
• Language: English
• Published: Heidelberg Wuhan University of Technology 01.04.2015; Springer Nature B.V
• Subjects: Aggregates; Cementitous Materials; Ceramics; Chemistry and Materials Science; Compressive strength; Concretes; Materials Science; Recycled; Regression analysis; Sand; Splitting; 再生骨料; 农村信用社; 劈裂抗拉强度; 抗压强度; 机械性能; 水泥浆体; 特细砂; 陶粒混凝土; property; ultra-fine sand; recycled ceramic coarse sand (RCCS); sustainability; regression analysis; recycled ceramic concrete (RCC)
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-015-1152-3

Recycled ceramic mixed sand（RCMS） was obtained by partially replacing ultra-fine sand with recycled ceramic coarse sand（RCCS）. The effects of RCCS replacement rate on the apparent density, workability, compressive strength and splitting tensile strength of recycled ceramic concrete（RCC） were investigated. In addition, the relationship between the water-cement ratio and compressive strength of RCC was also studied. The experimental results indicate that the reusing of recycled ceramic aggregate can improve the cohesiveness and water retentiveness of fresh concrete and benefit the mechanical properties development. When the RCCS replacement rate is not less than 40%, the mechanical properties of RCC are superior to those of the reference concrete. Moreover, when recycled ceramic medium sand was completely used as fine aggregate, the maximum increase in both compressive strength and splitting tensile strength were obtained, comparing with those of reference concrete, the increment ratio was 19.85% and 32.73%, respectively. The microscopic analysis shows that the using of recycled ceramic aggregate can meliorate distinctly the structure of the interfacial transition zone（ITZ） and increase the compaction degree of cement paste. Furthermore, an expression of the compressive strength of RCC and the cement-water ratio is regressed and gains a good linear relativity. It is an effective way to recycle waste ceramic, and the consumption of recycled ceramic aggregate could reach from 26.9% to 47.6% of the total weight of aggregate in producing concrete.