| 孙蓓,焦楚杰*.自然养护RPC爆炸破坏形态的试验研究[J].实验力学,2019,34(1):131~137 |
| 自然养护RPC爆炸破坏形态的试验研究 |
| Experimental investigation on explosion failure pattern of RPC subjected to natural curing |
| 投稿时间：2017-09-05 修订日期：2017-11-29 |
| DOI：10.7520/1001-4888-17-181 |
| 中文关键词: 自然养护 钢纤维 活性粉末混凝土 爆炸 破坏形态 |
| 英文关键词:natural curing steel fiber reactive powder concrete (RPC) explosion failure pattern |
| 基金项目:国家自然科学基金项目(51778158、51478128、51278135)、住房和城乡建设部科研开发项目(2010-K3-27、2010-K4-18)、广东省水利科技创新重点项目(2017-32)、广州大学重点科技项目培育项目(2015) |
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| 中文摘要: |
| 针对活性粉末混凝土(RPC)高温蒸养的弊端，提出自然养护RPC的制备技术。自然养护的RPC是以高强度等级水泥、高强掺合料、钢纤维等为原材料，采用常温标准养护制备而成的一种超高强混凝土材料。本文对钢纤维体积率0和2%的自然养护RPCV0和RPCV2板分别进行爆炸和相关力学性能的测试，并对自然养护RPC板的爆炸破坏形态进行阐述。测试结果表明，掺加钢纤维利于RPC抗压和劈裂抗拉强度的增加；在相同装药量引爆时，RPCV2板背爆面的加速度峰值显著低于RPCV0板，RPCV2板未形成贯穿孔，仅在迎爆面和背爆面中心部位出现爆坑，裂缝少而细，RPCV0板呈崩溃式破坏形态，裂缝多而粗。由此表明，RPCV2板表现出的优异抗爆、抗震塌性能，是由于钢纤维增强了RPC基体的塑性变形能力。 |
| 英文摘要: |
| In view of the disadvantages of high temperature steaming for reactive powder concrete (RPC), the preparation technology of natural curing RPC is put forward in this paper. Natural curing RPC is a super strength concrete material prepared from high strength grade cement, high strength admixture and steel fiber etc., by natural curing at room temperature. In this paper, explosion experiment and related mechanical property measurement for RPCV0 and RPCV2 plates with steel fiber volume ratio 0 and 2% respectively and subjected to natural curing were carried out, and the explosion failure pattern of natural curing RPC plate is expounded. Experimental results show that the addition of steel fiber can increase the compressive and splitting tensile strength of RPC. When the same charge amount is detonated, the acceleration peak value on the back surface of RPCV2 plate is significantly lower than that of RPCV0 plate. There is cratering but there is no shock collapse on the face and back surface of RPCV2 plate. However, there is a large area shock collapse on RPCV0 plate. It is shown that the excellent anti-explosion and anti-shock collapse performance of RPCV2 plate is due to the plastic deformation ability of RPC matrix reinforced by steel fibers. |
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