长江科学院院报 ›› 2017, Vol. 34 ›› Issue (8): 144-148.DOI: 10.11988/ckyyb.20160488

• 水工结构与材料 • 上一篇    下一篇

灰岩人工砂石粉含量试验检测方法探讨

郭文康1, 李先高2, 缪详辅2, 郭辉1, 石正国1   

  1. 1.长江科学院 工程质量检测中心,武汉 430010;
    2.华能澜沧江水电有限公司 黄登·大华桥水电工程建设与管理局,云南 兰坪 671400
  • 收稿日期:2016-05-19 修回日期:2016-06-17 出版日期:2017-08-01 发布日期:2017-08-18
  • 作者简介:郭文康(1986-),男,瑶族,湖南郴州人,工程师,硕士,主要从事水工混凝土性能及原材料应用的研究,(电话)18995627339(电子信箱)guowenkang86@163.com。

Discussion on Test Methods of Detecting Stone Powder Content in Artificial Limestone Sand

GUO Wen-kang1, LI Xian-gao2, MIU Xiang-fu2, GUO Hui1, SHI Zheng-guo1   

  1. 1. Engineering Quality Inspection Center, Yangtze River Scientific Research Institute, Wuhan 430010,China;
    2.Huangdeng & Dahuaqiao Hydropower Engineering Construction and Administration Department,Huaneng Lancang River Hydropower Co., Ltd., Lanping 671400,China
  • Received:2016-05-19 Revised:2016-06-17 Online:2017-08-01 Published:2017-08-18

摘要: 为探讨因《水工混凝土砂石骨料试验规程》修订更新导致新旧版本试验规程所推荐的石粉含量试验检测方法变化对试验检测结果的影响,结合黄登水电站工程实际,开展了不同试验检测方法对灰岩人工砂石粉含量检测结果的影响程度及规律试验研究,试验共检测灰岩人工砂石粉含量535组。试验结果表明:①试验检测方法对灰岩人工砂石粉含量检测结果影响显著,且具有一定规律性;②采用“湿筛水洗法”与“颗粒级配干筛法”得到的石粉含量结果差值和“湿筛水洗法”得到的微粒含量结果数据分布情况基本满足正态分布曲线;③采用2种试验方法检测的常态砂和碾压砂石粉含量结果差值分别为5%~9%和4%~8%,平均差值分别为6.7%和5.2%;④灰岩常态砂和碾压砂微粒含量在石粉含量中所占比例基本相同,约为石粉含量的80.4%。

关键词: 灰岩人工砂, 石粉含量, 试验检测方法, 微粒含量, 黄登水电站

Abstract: Test methods for stone powder content (hereafter referred to as SPC) are quite different between the 2001 version and 2014 version of Code for testing aggregates of hydraulic concrete. In order to investigate the influence of method change on SPC test results, we detected 535 groups of artificial limestone powder (hereafter referred to as ALP) from Huangdeng hydropower station by different test methods. Results indicate that the measured values of ALP are quite different by different SPC test methods, and the influence of test method is of some regularity. The deviations in SPC test results obtained by wet screening & washing method and dry-sieve method accord with normal distribution, and the measured values of micro-particle content of ALP by wet screening & washing method also follows normal distribution. Moreover, the deviations in ALP test results obtained by the two methods in normal concrete mainly varies from 5% to 9%, with the mean value of 6.7%; as for roller compacted concrete, the interval is from 4% to 9%, and the mean value is 5.2%. In addition, the proportions of micro-particle content in ALP in normal concrete and roller compacted concrete are identical in general, approximately accounting for 80.4% of SPC.

Key words: artificial limestone sand, stone powder content, testing detection method, microparticle content, Huangdeng hydropower station

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