本文選題：混凝土 + 低溫��； 參考：《硅酸鹽學(xué)報(bào)》2014年11期

【摘要】：比較兩種現(xiàn)有混凝土低溫力學(xué)性能試驗(yàn)方法,研究了低溫對(duì)相同含水率的混凝土力學(xué)性能影響。結(jié)果表明:將已達(dá)目標(biāo)溫度的試件置于室溫進(jìn)行力學(xué)性能測(cè)試,會(huì)導(dǎo)致試件溫度分布不均,很難準(zhǔn)確反映目標(biāo)溫度所對(duì)應(yīng)的混凝土低溫力學(xué)特性,而在低溫環(huán)境中進(jìn)行低溫力學(xué)性能測(cè)試更為合理。混凝土低溫抗壓強(qiáng)度增量會(huì)隨溫度降低而增長(zhǎng);劈裂強(qiáng)度增量則在-40~-80℃范圍內(nèi)出現(xiàn)極大值。在含水率相同情況下,膠凝材料比例差異對(duì)混凝土低溫劈裂強(qiáng)度影響遠(yuǎn)大于抗壓強(qiáng)度。
[Abstract]:The effects of low temperature on the mechanical properties of concrete with the same moisture content were studied by comparing the two test methods of low temperature mechanical properties of concrete. The results show that the mechanical properties of the specimens that have reached the target temperature can be measured at room temperature, which will lead to the uneven temperature distribution of the specimen, and it is difficult to accurately reflect the mechanical properties of concrete at low temperature corresponding to the target temperature. It is more reasonable to test the mechanical properties of low temperature in low temperature environment. The increment of low temperature compressive strength of concrete will increase with the decrease of temperature, while the increment of splitting strength will be maximized in the range of -40 ~ 80 鈩，

本文編號(hào)：1844675