海工高性能混凝土回弹测强研究--采用高强回弹仪建立海工高性能混凝土测强曲线.pdf

2014年第9期(总第299期)
凝土
实用技术
Number 9 in 2014(Total No 299)
Concrete
PRACTICAL TECHNOLOGY
doi:10.396951Sn.1002-3550.,2014.09.038
海工高性能混凝土回弹测强研究
一一采用高强回弹仪建立海エ高性能混凝土测强曲线
陶建飞,宋伟明
(中交二航局第二工程有限公司质量检测所,重庆400016)
摘要:施工现场高性能混凝土结构无损检测强度反映实际强度准确性的矛盾日益凸显。尤其对海工高性能混凝土而言,其回
弹推定强度往往比结构实际强度偏低很多,且没有地区或专用曲线采用。该研究通过采集不同强度等级海工高性能混凝土的试验
数据、分析处理、归纳得出回弹值与抗压强度之间的相关关系曲线。经计算其平均相对误差和相对标准差均优于规范关于专用回
弹曲线的规定。找到了合理解决海工高性能混凝土构件质量现场检验的方法,可以快速、准确、合理的评价现场构件的施工质量,
同时可节省人力、物力和财力,这将给施工带来极大的方便。经过验证,其具有普遍的适用性,将产生良好的社会效益与经济效
益,为以后建立全国统一的海工高性能混凝土回弹测强通用曲线提供必要的素材。
关键词:海工高性能混凝土;高強混凝土回弹仪;抗压强度;测强曲线;研究
中图分类号:TUS28.07
文献标志码:A文章编号:1002-3550(2014)09-0145-04
Study on marine high-performance concrete rebound strength test
-Establishment of marine high-performance concrete strength test curve by use of high-strength rebound meter
TAO Jianfei, SONG Weiming
(Inspected Department, The 2nd Engineering Co, Ltd. ofcccc Second Harbour Engineering Co, Ltd, Chongqing 400016, China)
Abstract: Nondestructive esting ength ofhigh-erformance concrete structure on construction site dont accurately correspond to
the actual strength, which presents a larger problem day by day. The presumptive rebound strength is usually much lower than the actual
strength in regard of marine high-performance concrete in particular and there has been no local or single -purpose curve for use. This
study has been concluded with the relevant relation curve between rebound value and compressive strength through data analysis process
ing collected from high-performance concrete experiment of various strength level. According to the single-purpose rebound curve rule
made by the calculation of its average relative rror and relative standard deviation, a sound method has been found to enable marine
high-performance concrete component on-site quality inspection, which can not only provide a sound evaluation of on-site component con-
struction quality with speed and accuracy but also help with the reservation of manpower, material and financial resources and thus facili-
tates the construction immensely. It has also been verified to have universal applicability and will produce social and economic benefit and
thus provides necessary material for the future establishment of nation-wide unified and universal marine high-performance concrete re-
bound strength test curve.
Key words: marine high-performance concrete; high-strength concrete rebound meter; compression strength strength test curve; study
道等大型、新型工程迅速兴起,海工高性能混凝土的应用
日益增多。检测所在沿海地区大量的海工高性能混凝土施
回弹法测强是目前现场结构泥凝土无损检测最便利工检测中,经常出现按JGJT23-2011《回弹法检测混凝
的方法之一,其基本原理为:通过混凝土表面硬度推定混土抗压强度技术规程》检测推定强度与立方体抗压强度相
凝土强度;其测强基本依据为:回弹值与混凝土抗压强度关性较差的现象。海洋工程中高性能混凝土结构采用现场
之间的相关性,相关关系一般以经验公式或基准曲线的形无损检测强度反映实际堀度准确性的矛盾日益凸显。
式来确定。
目前,国家行业标准JGJT23-201《回弹法检测混1海工高性能混凝土的定义及特点
凝土抗压强度技术规程》适用于标称能量为2.,207J地
所谓海工高性能混凝士是指使用常规材料、常规工
弹仪检测构件抗压强度为(10.0-60.0)MPa的混凝土的检艺,以较低水胶比、适当掺量活性掺合料和较严格的质量
测。随着经济的发展和科学技术的进步,跨海大桥、海底隧控铏措施,具有高的抗氯离子渗透性、满足结构要求的较
收稿日期:2014-03-26
145