下跌
混凝土坍落度试验
材料科学
抗压强度
岩土工程
骨料(复合)
水泥
复合材料
地质学
作者
Wen-ling Huang,Her-Yung Wang,Jheng-Hung Chen
出处
期刊:Computers and Concrete
日期:2016-06-01
标识
DOI:10.12989/cac.2016.17.6.787
摘要
Climate anomalies in recent years, numerous natural disasters caused by landslides and a large amount of entrained sands and stones in Taiwan have created significant disasters and greater difficulties in subsequent reconstruction. How to respond to these problems efficaciously is an important issue. In this
study, the sands and stones were doped with recycled materials (waste LCD glass sand, slag powder), and material was mixed for recycled ready-mixed soil. The study is based on security and economic principles, using flowability test to determine the water-binder ratio (W/B=2.4, 2.6, and 2.8), a fixed soil: sand ratio of 6:4 and a soil: sand: glass ratio of 6:2:2 as fine aggregate. Slag (at concentrations of 0%, 20%, and 40%)
replaced the cement. The following tests were conducted: flowability, initial setting time, unit weight, dropweight
and compressive strength. The results show that the slump values are 220 -290 mm, the slump flow values are 460 -1030 mm, and the tube flow values are 240-590 mm, all conforming to the objectives of the design. The initial setting times are 945-1695 min. The unit weight deviations are 0.1-0.6%. The three
groups of mixtures conform to the specification, being below 7.6 cm in the drop-weight test. In the compressive strength test, the water-binder ratios for 2.4 are optimal (13.78-17.84 kgf/cm2). The results show that Recycled ready-mixed soil materials (RRMSM) possesses excellent flowability. The other
properties, applied to backfill engineering, can effectively save costs and are conducive to environmental protection.
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