不同水胶比下磷渣在蒸养混凝土中的应用

Application of Phosphorus Slag in Steam-Cured Concrete with DifferentWater to Binder Ratios

摘要: 分别以普通纯水泥混凝土和高强纯水泥混凝土为对照组，在不改变蒸养制度的前提下，通过降低水胶比来提高掺磷渣的蒸养混凝土的拆模强度，并探究其后期抗压强度发展规律及抗氯离子渗透性。研究表明，在不改变水胶比时，掺入磷渣会显著降低蒸养混凝土的拆模强度；适当降低水胶比后，掺磷渣的蒸养混凝土的拆模强度接近甚至超过对照组，且后期具有较高的抗压强度增长速率和抗氯离子渗透性。

Abstract: The ordinary plain concrete and high strength plain concrete were set as control samples. Decreasing water to binder ratio (W/B) was used to elevate the demolding strength of steam-cured concrete containing phosphorus slag under the same curing condition. The compressive strength and chloride ion penetration of steam-cured concrete containing phosphorus slag with decreased W/B were also investigated. The results show that addition of phosphorus slag decreases the de-molding strength of the concrete containing phosphorus slag with the same W/B as control sample. The demolding strength of concrete containing phosphorus slag with decreased W/B is close to or even higher than that of control sample. What’s more, the compressive strength development and chloride ion penetration resistance of the concrete containing phosphorus slag are higher than those of the control samples at late ages.