Use of recycled aggregates in molded concrete bricks and blocks
Use of recycled aggregates in molded concrete bricks and blocks
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DOI：
10.1016/s0950-0618(02)00019-3
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发表时间：
2002-07-01
影响因子：
7.4
通讯作者：
Lam, L
中科院分区：
文献类型：
--
作者：
Poon, CS;Kou, SC;Lam, L
本研究的目的是开发一种技术，用于生产混凝土砖和铺路砖使用再生骨料从建筑和拆除废物。我们进行了实验室试验，以研究使用来自香港不同来源的再生骨料，作为成型砖和砌块的粗骨料和细骨料的替代品的可能性。进行了一系列试验，以确定用和不用再生骨料制备的砖和砌块的性能。试验结果表明，再生骨料在25%和50%的水平下取代天然粗骨料和天然细骨料对砖和砌块试件的抗压强度影响不大，但取代程度越高，抗压强度越低。然而，试样的横向强度随着置换率的增加而增加。使用再生骨料作为高达100%水平的天然骨料的替代物，可以在不掺入粉煤灰的情况下生产28天抗压强度不低于49 MPa的混凝土铺路砖，而可以在掺入粉煤灰的情况下生产抗压强度为30 MPa的人行道用铺路砖和砖石，（C）2002 Elsevier Science Ltd.保留所有权利。
This study aimed to develop a technique for producing concrete bricks and paving blocks using recycled aggregates obtained from construction and demolition waste. Laboratory trials were conducted to investigate the possibility of using recycled aggregates from different sources in Hong Kong, as the replacement of both coarse and fine natural aggregates in molded bricks and blocks. A series of tests were carried out to determine the properties of the bricks and blocks prepared with and Without recycled aggregates. The test results showed that the replacement of coarse and fine natural aggregates by recycled aggregates at the levels of 25 and 50% had little effect on the compressive strength of the brick and block specimens, but higher levels of replacement reduced the compressive strength. However, the transverse strength of the specimens increased as the percentage of replacement increased. Using recycled aggregates as the replacement of natural aggregates at the level of up to 100%, concrete paving blocks with a 28-day compressive strength of not less than 49 MPa can be produced without the incorporation of fly ash, while paving blocks for footway uses with a lower compressive strength of 30 MPa and masonry bricks can be produced with the incorporation of fly ash, (C) 2002 Elsevier Science Ltd. All rights reserved.