玻璃和粉煤灰在控制低强度材料制造中的应用

T. Naik, R. N. Kraus, Shiw S. Singh
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引用次数: 10

摘要

这项工作是为了开发两种控制低强度材料(CLSM)或流动浆料,利用消费后玻璃(碎玻璃或玻璃碎片)骨料和粉煤灰。A型CLSM由玻璃、粉煤灰、水泥和水组成;B型CLSM由玻璃、砂、水泥和水组成。所有混合物按比例配制,使其28天抗压强度达到0.7 MPa (100 psi)。A型CLSM混合物由一种对照混合物(100%不含玻璃的粉煤灰)和另外五种含玻璃的混合物组成,以替代20%至80%的粉煤灰。B型CLSM混合物由对照混合物(不含玻璃)和另外两种混合物组成,用玻璃代替30%至75%的砂。本项目开发的可流动浆料满足ACI委员会229对CLSM的定义。减少粉煤灰掺量和增加玻璃掺量,在60%和80%的高替代水平下,会导致出血性和离析加剧。A型CLSM的渗透率基本保持不变,但玻璃含量高时渗透率较低。B型CLSM的渗透率基本相同。
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Use of Glass and Fly Ash in Manufacture of Controlled low Strength Materials
This work was conducted to develop two types of controlled low strength materials (CLSM) or flowable slurry utilizing post-consumer glass (broken glass or glass cullet) aggregate and fly ash. Type A CLSM consisted of glass, fly ash, cement, and water; and Type B CLSM consisted of glass, sand, cement, and water. All mixtures were proportioned to achieve the 28-day compressive strength of 0.7 MPa (100 psi). The type A CLSM mixtures consisted of a control mixture (100% fly ash without glass) and five other mixtures with glass, as a replacement of fly ash in the range of 20% to 80%. The Type B CLSM mixtures were composed of a control mixture (without glass) and two other mixtures at 30% to 75% replacement of sand with glass. The flowable slurry developed in this project satisfied the ACI Committee 229 definition of CLSM. Decreasing the amount of fly ash and increasing the glass content led to increased bleeding and segregation at high replacement levels of 60% and 80%. Permeability of Type A CLSM remained essentially unchanged, except at high glass contents it was lower. For Type B CLSM, the permeability was about the same.
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