橡膠-鋼纖維混摻碾壓混凝土的力學(xué)性能研究
發(fā)布時(shí)間:2018-01-11 22:07
本文關(guān)鍵詞:橡膠-鋼纖維混摻碾壓混凝土的力學(xué)性能研究 出處:《混凝土》2017年11期 論文類(lèi)型:期刊論文
更多相關(guān)文章: 碾壓混凝土 橡膠顆粒 鋼纖維 力學(xué)性能
【摘要】:探討了橡膠粒和鋼纖維混合摻入對(duì)碾壓混凝土力學(xué)性能的影響及規(guī)律。橡膠粒等體積替代砂,摻量分別為5%、10%、15%、20%,鋼纖維體積摻量分別為1.0%、1.3%、1.6%、2.0%。結(jié)果表明:相同鋼纖維摻量下,隨著橡膠顆粒摻量的增加,碾壓混凝土的抗折強(qiáng)度與抗壓強(qiáng)度均先增加后降低,橡膠粒10%時(shí)強(qiáng)度最高。相同橡膠顆粒摻量下,隨著鋼纖維摻量的增加,碾壓混凝土的抗壓強(qiáng)度先增加后降低,之后又出現(xiàn)了不同程度的增加。橡膠顆粒摻量為5%、10%時(shí),碾壓混凝土的抗折強(qiáng)度的變化規(guī)律與抗壓強(qiáng)度一致,但摻量為15%、20%時(shí)抗折強(qiáng)度只有先增加后降低的趨勢(shì),后期未出現(xiàn)回升,鋼纖維1.3%時(shí)強(qiáng)度最高。經(jīng)試驗(yàn),鋼纖維1.3%、橡膠粒10%摻量組合的強(qiáng)度最優(yōu)。
[Abstract]:The influence of rubber particle and steel fiber on the mechanical properties of roller compacted concrete is discussed. The volume content of steel fiber is 1.0 / 1.3 / 1.6 / 2.0.The results show that the content of rubber particles increases with the same amount of steel fiber. The flexural strength and compressive strength of RCC increased first and then decreased, and the strength of RCC was the highest at 10. Under the same amount of rubber particles, with the increase of steel fiber content. The compressive strength of RCC first increases and then decreases, then increases to varying degrees. When the rubber particle content is 5, 10, the change of RCC flexural strength is consistent with that of RCC. However, the flexural strength increased first and then decreased at 20s, but did not rise again at the later stage. The strength of steel fiber was the highest at 1.3. the test showed that the strength of steel fiber was 1.3%. The strength of rubber particle 10% was optimal.
【作者單位】: 北京航空航天大學(xué)交通科學(xué)與工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51378042)
【分類(lèi)號(hào)】:TU528
【正文快照】: 0引言碾壓混凝土是一種水灰比小、坍落度接近零、密實(shí)性及強(qiáng)度較高的干硬性混凝土。依據(jù)已有的科研成果,國(guó)內(nèi)外已將碾壓混凝土應(yīng)用于公路、鐵路、大壩、工業(yè)民用建筑等領(lǐng)域[1]。與塑性混凝土相比,碾壓混凝土具有快速攪拌施工、水泥用量少、節(jié)約工程造價(jià)、抗凍性及耐久性好等特
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