PVA-FRCC抗壓強(qiáng)度增長(zhǎng)規(guī)律分析與預(yù)測(cè)
發(fā)布時(shí)間:2018-04-15 16:37
本文選題:聚乙烯醇纖維 + 齡期 ; 參考:《混凝土與水泥制品》2014年12期
【摘要】:通過(guò)不同PVA纖維體積率在3d、7d、14d、28d、56d、90d及120d齡期的立方體抗壓強(qiáng)度試驗(yàn),得到纖維體積率和齡期對(duì)PVA纖維增強(qiáng)水泥基復(fù)合材料立方體抗壓強(qiáng)度變化規(guī)律的影響并建立了預(yù)測(cè)模型。結(jié)果表明,PVA纖維的摻入不能增加立方體的抗壓強(qiáng)度,但可以提高抗壓強(qiáng)度前期的增長(zhǎng)速率,增強(qiáng)前期強(qiáng)度,彌補(bǔ)了粉煤灰的摻入導(dǎo)致PVA-FRCC立方體抗壓強(qiáng)度前期不足的缺陷。并且,PVA纖維具有阻裂作用。齡期影響著抗壓強(qiáng)度的增長(zhǎng)速率在整個(gè)過(guò)程中的變化。所建立的PVA纖維增強(qiáng)水泥基復(fù)合材料立方體抗壓強(qiáng)度預(yù)測(cè)模型,擬合優(yōu)度較好,誤差較小,并具有收斂性,符合PVA纖維增強(qiáng)水泥基復(fù)合材料抗壓強(qiáng)度的發(fā)展規(guī)律。
[Abstract]:Based on the cube compressive strength tests of different volume ratios of PVA fibers at the ages of 3 d ~ 7 d ~ 14 d ~ 28 d ~ 56 d ~ (90 d) and 120 d, the effects of fiber volume ratio and age on the cube compressive strength of PVA fiber reinforced cement matrix composites were obtained and a prediction model was established.The results show that the addition of polyvinyl alcohol fiber can not increase the compressive strength of the cube, but can increase the growth rate of the pre-compressive strength and strengthen the pre-strength, which makes up for the deficiency of the pre-compressive strength of PVA-FRCC cube caused by the addition of fly ash.And PVA fiber has anti-cracking effect.Age affects the growth rate of compressive strength in the whole process.The cubic compressive strength prediction model of PVA fiber reinforced cement matrix composites has good fit, small error and convergence, which accords with the development law of compressive strength of PVA fiber reinforced cement matrix composites.
【作者單位】: 內(nèi)蒙古工業(yè)大學(xué)礦業(yè)學(xué)院;內(nèi)蒙古工業(yè)大學(xué)土木工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(51168033,51368041)
【分類號(hào)】:TU528.581
【參考文獻(xiàn)】
相關(guān)期刊論文 前5條
1 高淑玲;徐世p,
本文編號(hào):1754920
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