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（1 內(nèi)蒙古科技大學(xué)建筑與土木工程學(xué)院， 包頭 014010； 2 青島理工大學(xué)土木工程學(xué)院， 青島 266033)
［摘要］研究了不同摻量短切玄武巖纖維對輕骨料混凝土的抗壓強(qiáng)度、劈裂抗拉強(qiáng)度和抗折強(qiáng)度三種力學(xué)性能的影響。結(jié)果表明，摻入玄武巖纖維的輕骨料混凝土的7d抗壓強(qiáng)度隨纖維摻量的增加而增大，但對28d抗壓強(qiáng)度沒有顯著影響，當(dāng)纖維摻量超過0-15%時(shí)，28d抗壓強(qiáng)度呈下降發(fā)展趨勢；隨玄武巖纖維摻量的增加，輕骨料混凝土的劈裂抗拉強(qiáng)度及抗折強(qiáng)度均呈先增加后降低的發(fā)展趨勢，當(dāng)纖維摻量為0-15%時(shí)，上述兩種強(qiáng)度指標(biāo)均取得最大值；玄武巖纖維摻入輕骨料混凝土中能夠改善其脆性，增加其韌性，改善輕骨料混凝土的受壓破壞形態(tài)和抗折破壞形態(tài)。
［關(guān)鍵詞］短切玄武巖纖維； 輕骨料混凝土； 力學(xué)性能； 脆性
中圖分類號：TU528-572文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)15-0047-05
Experimental study on mechanical properties of chopped basalt fiber reinforced lightweight aggregate concrete
Li Jingjun1， Niu Jiangang1， Wu Yunchao2， Zhu Cong1
(1 School of Architecture and Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China; 2 School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China)
Abstract:The influence of different chopped basalt fiber dosages on the mechanical properties, including compressive strength, splitting tensile strength and flexural strength of lightweight aggregate concrete (LWAC) were investigated. The results show that the compressive strength of LWAC with basalt fiber dosages at 7-day increases with the increase of fiber dosage. However, the chopped basalt fiber has no significant effect on the compressive of LWAC at 28-day and a decrease tendency in the compressive strength of LWAC at 28-day is observed when the fiber dosage is more than 0-15%. The splitting tensile and flexural strength of LWAC increase first and then decrease with the increase of fiber dosage and the maximum splitting and flexural strength are obtained when the fiber dosage is 0-15%. The incorporation of chopped basalt fiber into LWAC can improve its brittleness and enhance its toughness, and meanwhile, the failure patterns under compression and flexure can be improved.
Keywords:chopped basalt fiber; lightweight aggregate concrete; mechanical property; brittleness
*國家自然科學(xué)基金資助項(xiàng)目（51368042）。
作者簡介：李京軍，博士研究生，Email：642229851@qq.com。
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