CAJ | 학술논문

将水泥、粉煤灰和磨细高炉矿渣作为保水材料灌注于多孔水泥混凝土母体中,形成具有保水降温功能的铺面材料。分别提供了多孔水泥混凝土母体和保水材料的设计方法,并成型试件对保水铺面水泥混凝土材料的强度、降温效果和抗冻性进行了测试。实验结果表明设计的多孔水泥混凝土母体和保水材料均满足施工和功能要求,成型的保水降温功能水泥混凝土试件28d抗压强度和抗折强度分别能够达到27.7和38.2MPa;在最高气温为33℃的测试条件下,其表面最高温度比普通水泥混凝土降温7℃左右,但随着水分的减少降温效果变差;此外,冻融后保水降温水泥混凝土抗压强度会下降,但不明显。
장수니、분매회화마세고로광사작위보수재료관주우다공수니혼응토모체중,형성구유보수강온공능적포면재료。분별제공료다공수니혼응토모체화보수재료적설계방법,병성형시건대보수포면수니혼응토재료적강도、강온효과화항동성진행료측시。실험결과표명설계적다공수니혼응토모체화보수재료균만족시공화공능요구,성형적보수강온공능수니혼응토시건28d항압강도화항절강도분별능구체도27.7화38.2MPa;재최고기온위33℃적측시조건하,기표면최고온도비보통수니혼응토강온7℃좌우,단수착수분적감소강온효과변차;차외,동융후보수강온수니혼응토항압강도회하강,단불명현。
Water-holding material containing cement, fly-ash and grinding granulated blast furnace slag were poured into porous cement concrete matrix to form water-holding and cooling concrete. Design methods of por- ous cement concrete matrix and water-holding material were provided respectively, and water-holding and cool- ing concrete specimens were made to test strength, cooling effect and freezing resistance performance. Test re- sults show that the porous cement concrete matrix and water-holding material could meet the construction and performance demand. The 28d compressive strength and flexural strength of specimens were 27.7 and 38.2MPa respectively, the surface temperature of water-holding and cooling concrete was 7℃ less than that of ordinary concrete under 33℃ of air temperature, but cooling effect would be reduced along with the decrease of water content. The specimen compressive strength decline was not obvious after freeze thaw cycles.