砂浆的准绝热温升特性与抗压强度的相关性研究

Associating semi-adiabatic temperature evolution with compressive strength of mortar

考察了包含不同胶凝材料砂浆的准绝热温升特性及其抗压强度,获得了砂浆的水化温升值与其抗压强度的量化关系。结果表明:中热水泥砂浆的温升值和温升速率比低热水泥砂浆大;包含粉煤灰的砂浆与纯水泥砂浆相比,温升速率和温升值均明显减小;水胶比越高,砂浆的水化温升值和温升速率越小;砂浆的抗压强度与水化温升值呈正向线性关系,且这种关系基本不受胶凝材料体系和水胶比的影响。在一定范围内可由砂浆(水泥基材料)的水化温升特性推定其抗压强度。

Semi-adiabatic temperature evolution （SATE） and compressive strength of mortars containing different binders wereexamined. Quantitative relationship between temperature rise value and compressive strength were obtained. The results show thatthe values and rates of temperature rise of moderate heat cement mortars were larger than those of low heat cement mortars：thevalues and rates of temperature rise of the mortars containing fly ash were smaller than pure cement mortars; the higher the water-binder ratio （W/B）, the smaller the values and rates of temperature rise was. Compressive strength of the mortars was directly pro-portional to their values of temperature rise,regardless of composition of cementitious system and W/B. Consequently,compressivestrength of mortar（cement-based materials） can be estimated from their SATE.