【摘要】：為模擬濕態(tài)混凝土所處的短期水環(huán)境工作狀態(tài),將100 mm×100 mm×100 mm立方體混凝土試件浸于水中,通過浸水時間長短得到不同含水率后,進行試件軸心抗壓試驗。試驗以不同配合比、含水率、養(yǎng)護時間為自變量,采用正交試驗設計方法,重點研究了C30混凝土在不同齡期、不同含水率下的抗壓性能。結果表明:含水率隨浸水時間延長而增大,并趨于穩(wěn)定;相同配合比及浸水時間下,隨著養(yǎng)護時間的增長,混凝土的吸水量逐漸減少。混凝土極限抗壓強度與含水率的變化規(guī)律因齡期的不同而存在差異。早期混凝土強度隨含水率增長而增加;但含水率對28 d齡期強度影響不大,略有增加;40 d齡期時,含水率對極限強度呈現(xiàn)一定的"削弱"作用。
[Abstract]:In order to simulate the short term water environment of wet concrete, the specimens of 100 mm 脳 100 mm cubic concrete were immersed in water. The axial compression tests of the specimens were carried out after the different moisture content was obtained by immersion time. With different mix ratio, moisture content and curing time as independent variables, the compressive performance of C30 concrete under different age and moisture content was studied by orthogonal design method. The results show that the moisture content increases with the increase of soaking time and tends to be stable, and the water absorption of concrete decreases with the increase of curing time at the same mixing ratio and soaking time. The variation of ultimate compressive strength and moisture content of concrete varies with age. The strength of early concrete increases with the increase of moisture content, but the water content has little effect on the strength of 28 days old, and the water content has a certain "weakening" effect on the ultimate strength of concrete at 40 days of age.
【作者單位】： 湖北工業(yè)大學土木工程與建筑學院;武漢理工大學理學院;
【基金】：國家自然科學基金資助項目(51378182)
【分類號】：TU528

【參考文獻】

相關期刊論文 前6條

1 鄧友生;閆衛(wèi)玲;楊敏;黃恒恒;;環(huán)境水對混凝土靜力強度影響的研究進展[J];水利水電科技進展;2015年04期

2 杜修力;金瀏;;飽和混凝土有效模量及有效抗拉強度研究[J];水利學報;2012年06期

3 徐世p，

本文編號：2265084