乳化瀝青對(duì)鋼筋混凝土梁抗裂性能影響試驗(yàn)研究*
寧寶寬1，胡海濤1，張思淼1，毛建偉2
- 摘 要
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（1 沈陽工業(yè)大學(xué)建筑工程學(xué)院， 沈陽 110870； 2 中冶焦耐工程技術(shù)有限公司， 大連 116085）［摘要］為了研究摻乳化瀝青鋼筋混凝土梁的彎曲抗裂性能，通過四點(diǎn)彎曲試驗(yàn)對(duì)不同乳化瀝青摻量的5組共計(jì)10根鋼筋混凝土梁進(jìn)行試驗(yàn)測(cè)試，觀察并記錄了從加載開始至破壞整個(gè)過程中鋼筋混凝土梁的裂縫開展、變形、承載力等情況，并與普通鋼筋混凝土梁做對(duì)比。試驗(yàn)結(jié)果表明：較低乳化瀝青摻量（1%～3%）能夠明顯改善鋼筋混凝土梁的整體變形能力，提高鋼筋混凝土梁的初裂荷載、跨中撓度，且對(duì)混凝土抗壓強(qiáng)度影響較??；較高乳化瀝青摻量（5%～7%）使鋼筋混凝土梁的極限荷載降低較多，不能改善其韌性和整體變形能力。［關(guān)鍵詞］乳化瀝青; 鋼筋混凝土梁; 極限荷載; 耐久性中圖分類號(hào)：TU377 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2014)19-0092-03Experimental research on the crack resistance ability of reinforced concrete beam mixed with emulsified asphaltNing Baokuan1, Hu Haitao1, Zhang Simiao1, Mao Jianwei2（1 School of Architecture and Civil Engineering , Shenyang University of Technology, Shenyang 110870, China; 2 ACRE Coking and Refractory Engineering Consulting Corporation, MCC, Dalian 116085, China）Abstract: In order to research the bending crack resistance ability of reinforced concrete beam mixed with emulsified asphalt, four-point bending tests were carried out on 5 groups of 10 reinforced concrete beams with different quantities of mixed emulsified asphalt. Cracks, deformation and bearing capacity of the beams were observed and recorded from loading to destructive state, and then a comparison of experimental results was made between reinforced concrete beams mixed with emulsified asphalt and ordinary reinforced concrete beams. The experimental results show that lower emulsified asphalt dosages (from 1% to 3% )can significantly improve the overall deformation ability of the reinforced concrete beam, increase initial crack loading and midspan deflection, and influence little on compressive strength of the concrete. While higher asphalt emulsified asphalt dosages ( from 5% to 7% ) can reduce the ultimate load of the reinforced concrete beam sharply and fail to improve its toughness and overall deformation capacity.Keywords:emulsified asphalt; reinforced concrete beam; ultimate load; durability*國家自然科學(xué)基金（51279109），遼寧省教育廳資助項(xiàng)目（201364088）。作者簡介：寧寶寬，教授，博士，Email：ningbk@126.com。參考文獻(xiàn)［1］徐世烺，李慶華. 超高韌性復(fù)合材料控裂功能梯度復(fù)合梁彎曲性能理論研究［J］. 中國科學(xué)E輯:技術(shù)科學(xué), 2009, 39(6):1081-1094.［2］張秀芳，徐世烺. 采用超高韌性水泥基復(fù)合材料提高鋼筋混凝土梁彎曲抗裂性能研究(I):基本理論［J］.土木工程學(xué)報(bào), 2008, 41(12): 48-54.［3］孫東根,汪波,朱新實(shí),等. 水泥乳化瀝青碎石基層材料性能與應(yīng)用［J］.公路交通科技. 2007, 24（8）:27-31.［4］杜少文,王振軍. 水泥改性乳化瀝青混凝土力學(xué)性能與微觀機(jī)理［J］.同濟(jì)大學(xué)學(xué)報(bào)：自然科學(xué)版，2009,37（8）:1040-1043.［5］沙愛民,王振軍. 水泥乳化瀝青混凝土膠漿-集料界面微觀結(jié)構(gòu)［J］.長安大學(xué)學(xué)報(bào)：自然科學(xué)版，2008，28（4）:1-6.
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