Development of Water Retentive and Thermal Resistant Cement Concrete and Cooling Effects Evaluation.
Development of Water Retentive and Thermal Resistant Cement Concrete and Cooling Effects Evaluation.
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DOI：
10.3390/ma14206141
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发表时间：
2021-10-16
期刊：
影响因子：
--
通讯作者：
Chen H
中科院分区：
文献类型：
--
作者：
Wang X;Hu X;Ji X;Chen B;Chen H
较高的路面温度对夏季城市热岛效应的发展起着重要作用。本研究的目的是研制保水耐热水泥混凝土，以提高路面的降温效果。将保水材料、高铝质耐火骨料(RA)与多孔性水泥混凝土(PCC)相结合，制备了多孔水泥混凝土(PCC)。通过保水性能试验、流动性试验和抗压强度试验，确定了保水材料的组成比。通过抗压、抗折强度试验和温度监测试验，评价了WTCC的力学性能和降温效果。确定了保水材料中飞灰、硅灰、水泥和水的质量比为65：35：15：63.9。养护28d后，WTCC的抗压强度和抗折强度分别为30.4 Mpa和4.6 Mpa。与SMA混合料、PCC和保水水泥混凝土(WCC)相比，WTCC的表面温度分别降低了11.4℃、5.5℃和4.1℃，内部温度分别降低了10.3℃、6.1℃和4.6℃。该保水材料对污水处理厂具有提高强度、降低温度的作用。结果表明，WTCC具有良好的降温效果，具有有效缓解城市热岛效应的潜力，可应用于中等交通道路。
The high pavement temperature plays an important role in the development of urban heat island (UHI) in summer. The objective of this study was to develop water retentive and thermal resistant cement concrete (WTCC) to enhance the pavement cooling effects. The WTCC was prepared by combining a water retentive material and a high aluminum refractory aggregate (RA) with porous cement concrete (PCC). Water retention capacity test, fluidity test, and compressive strength test were used to determine the composition ratio of the water retentive material. Mechanical performance and cooling effects of WTCC were evaluated by compressive and flexural strength tests and temperature monitoring test. The mass ratios of fly ash, silica fume, cement, and water in the water retentive material were determined as 65:35:15:63.9. The compressive strength and the flexural strength of WTCC after 28 days curing were 30.4 MPa and 4.6 MPa, respectively. Compared with stone mastic asphalt (SMA) mixture, PCC, and water retentive cement concrete (WCC), surface temperature of WTCC decreased by 11.4 °C, 5.5 °C, and 4.1 °C, respectively, and the internal temperatures of WTCC decreased by 10.3 °C, 6.1 °C, and 4.6 °C, respectively. The water retentive material has benefits of strength improvements and temperature reduction for WTCC. Based on the results, WTCC proved to have superior cooling effects and the potential to efficiently mitigate the UHI effects and be used in medium traffic roads.
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影响因子：
7.4
作者：
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通讯作者：
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DOI：
10.1061/(asce)mt.1943-5533.0003300
发表时间：
2020-09-01
影响因子：
3.2
作者：
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通讯作者：
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