| 软弱砂岩骨料碾压混凝土的配制及其特性研究 |
| |
| 引用本文： | 刘伟宝,陆采荣,梅国兴,戈雪良,王珩,杨虎.软弱砂岩骨料碾压混凝土的配制及其特性研究[J].海洋工程,2014,32(6):105-110. |
| |
| 作者姓名： | 刘伟宝 陆采荣 梅国兴 戈雪良 王珩 杨虎 |
| |
| 作者单位： | 南京水利科学研究院 水文水资源与水利工程科学国家重点实验室，水利部水工新材料工程技术研究中心，江苏 南京 210029 |
| |
| 基金项目： | 水利部公益性行业科研专项资金项目 |
| |
| 摘 要： | 在东南亚和我国西南地区由于缺乏合适的原材料,必须采用软弱骨料配制混凝土。以东南亚某工程现场的软弱砂岩为原材料,开展碾压混凝土配制和性能试验工作,探讨了该骨料配制碾压混凝土的可行性。采用软化系数为0.71的软弱砂岩,配制强度等级分别为C18020的二级配碾压混凝土和C1807.5的三级配碾压混凝土。结果表明,采用该砂岩骨料可以配制出满足强度要求的碾压混凝土,其用水量比常规骨料高15~20 kg/m3,拌和物密度和抗压弹模较低。其中,二级配碾压混凝土采用50%粉煤灰掺量、0.55水胶比;三级配碾压混凝土采用60%粉煤灰掺量、0.65水胶比。骨料抗碾压破碎模拟试验表明该骨料在碾压过程中破坏程度很低,说明采用该软弱骨料配制碾压混凝土具有可行性。
|
| 关 键 词： | 软弱砂岩骨料 碾压混凝土 配合比 软化系数 强度等级 破碎模拟 |
Preparation and performance of roller compacted concrete with soft sandstone aggregate |
| |
| LIU Wei-bao,LU Cai-rong,MEI Guo-xing,GE Xue-liang,WANG Heng and YANG Hu.Preparation and performance of roller compacted concrete with soft sandstone aggregate[J].Ocean Engineering,2014,32(6):105-110. |
| |
| Authors: | LIU Wei-bao LU Cai-rong MEI Guo-xing GE Xue-liang WANG Heng and YANG Hu |
| |
| Institution: | State Key Lab of Hydrology-Water Resources and Hydraulic Engineering, Research Center on New Materials of Hydraulic Engineering of MWR, Nanjing Hydraulic Research Institute, Nanjing 210029, China;State Key Lab of Hydrology-Water Resources and Hydraulic Engineering, Research Center on New Materials of Hydraulic Engineering of MWR, Nanjing Hydraulic Research Institute, Nanjing 210029, China;State Key Lab of Hydrology-Water Resources and Hydraulic Engineering, Research Center on New Materials of Hydraulic Engineering of MWR, Nanjing Hydraulic Research Institute, Nanjing 210029, China;State Key Lab of Hydrology-Water Resources and Hydraulic Engineering, Research Center on New Materials of Hydraulic Engineering of MWR, Nanjing Hydraulic Research Institute, Nanjing 210029, China;State Key Lab of Hydrology-Water Resources and Hydraulic Engineering, Research Center on New Materials of Hydraulic Engineering of MWR, Nanjing Hydraulic Research Institute, Nanjing 210029, China;State Key Lab of Hydrology-Water Resources and Hydraulic Engineering, Research Center on New Materials of Hydraulic Engineering of MWR, Nanjing Hydraulic Research Institute, Nanjing 210029, China |
| |
| Abstract: | Soft aggregates have to be adopted to make concrete due to the lack of appropriate raw materials in the areas of Southeast Asia and Southwest China. A type of soft sandstone from a construction site in Southeast Asia was applied in the preparation and performance experiment of roller compacted concrete (RCC), and the application feasibility of such a soft aggregate was also discussed. The sandstone whose softening coefficient is 0.71 was adopted to prepare the C18020 2-graded RCC and the C1807.5 3-graded RCC. Experimental results show that the strength of the RCC can meet the requirement of designing; the water usage is 15~20 kg/m3 higher than the RCC with normal aggregate, and the density and compressive elastic modulus are apparently lower. For the 2-graded RCC, the content proportion of fly ash is 50%, and the W/B ratio is 0.55; and for the 3-graded RCC , the content proportion of fly ash is 60% and the W/B ratio is 0.65. Since the soft aggregate was rarely damaged in the indoor broken-resistance experiments, the aggregate of soft sandstone is practicable for the preparation of RCC. |
| |
| Keywords: | soft sandstone aggregate roller compacted concrete concrete mixing softening factor strength grade broken simulation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋工程》浏览原始摘要信息 |
| 点击此处可从《海洋工程》下载免费的PDF全文 |
|
