机制砂混凝土配合比设计及工作性能试验研究
中铁十六局集团路桥工程有限公司, 北京 101500
| 摘 要： | 以机制砂补充替代天然砂，已经成为土木工程建设的必然趋势。其推广和应用不仅能有效缓解天然砂供应不足的问题，还对践行生态文明建设，推动社会可持续发展起到关键作用。然而，机制砂混凝土的性能受到多种因素影响，各地区对机制砂的研究和应用水平也存在较大差异，尚未形成完善的机制砂理论体系，特别是对机制砂混凝土早期抗裂性能的研究相对较少。本文根据石灰岩机制砂特性，对石灰岩机制砂混凝土制备过程中的鹅卵石机制砂复掺比例进行了研究。我们分析了不同石灰岩机制砂取代率、水胶比和砂率对机制砂混凝土性能的影响，并进行了系列试验研究。试验结果表明，在石灰岩机制砂取代率为40%~60%、水胶比为0.38、砂率为0.38时，其受力性能最优。随着石灰岩机制砂取代率的增加，混凝土性能可能变差；适度增加水胶比可以提高其性能；在相同条件下，砂率的增加将使混凝土性能更好。 |
| 关 键 词： | 机制砂; 混凝土; 配合比设计; 工作性能; 试验研究 |
| DOI： | 10.57237/j.cear.2023.03.003 |
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收稿日期: 2023-09-19
接受日期: 2023-10-25
在线出版日期: 2023-10-28
Mix Design and Working Performance Test of Machine-made sand Concrete
China Railway 16th Bureau Group Road and Bridge Engineering Co, Beijing 101500, China
| Abstract: | Replacing natural sand with machine-made sand has become an inevitable trend in civil engineering construction. Its promotion and application not only effectively alleviate the problem of insufficient natural sand supply, but also play a key role in practicing ecological civilization construction and promoting sustainable social development. However, the performance of machine-made sand concrete is influenced by various factors, and there are significant differences in the research and application levels of machine-made sand in different regions. A comprehensive theoretical system of machine-made sand has not yet been formed, especially the research on the early crack resistance of machine-made sand concrete is relatively limited. This article studies the composite ratio of cobblestone machine-made sand in the preparation process of limestone machine-made sand concrete based on the characteristics of limestone machine-made sand. We analyzed the effects of different replacement rates, water cement ratios, and sand ratios of limestone machine-made sand on the performance of machine-made sand concrete, and conducted a series of experimental studies. The experimental results show that the mechanical performance of limestone is optimal when the replacement rate of sand is 40%~60%, the water cement ratio is 0.38, and the sand ratio is 0.38. As the replacement rate of limestone mechanism sand increases, the performance of concrete may deteriorate. Moderately increasing the water adhesive ratio can improve its performance. Under the same conditions, an increase in sand content will improve the performance of concrete. |
| Keywords: | Machine-made Sand; Concrete; Mix Design; Working Performance; Experimental Study |
参考文献
| [1] | 董瑞, 陈晓芳, 钟建锋, 等. 石灰岩性机制砂特性研究 [J].混凝土, 2013, 03: 123-134. |
| [2] | 蒋正武, 潘峰, 吴建林, 等. 机制砂参数对混凝土性能的影响研究 [J]. 混凝土世界, 2011, 08: 66-70. |
| [3] | 刘雪, 郭远臣, 王雪, 等. 混凝土裂缝成因研究进展 [J]. 硅酸盐通报, 2018, 37(07): 2173-2178. |
| [4] | 徐健, 蔡基伟, 王稷良, 等. 人工砂与人工砂混凝土的研究现状 [J]. 国外建材科技, 2004(03): 20-24. |
| [5] | 杨文烈, 邸春福. 机制砂的生产及在混凝土中的应用 [J]. 混凝土, 2008(06): 113-117. |
| [6] | 林力勋. 山砂及山砂混凝土的研究历程 [J]. 四川建筑科学研究, 2010, 36(03): 188-190. |
| [7] | 江京平. 《建筑用砂》(GB/T14684-2001)内容概要与人工砂应用前景展望 [J]. 建筑技术, 2003(01): 54-56. |
| [8] | 张义芳. 人工砂石系统工艺及质量控制方法研究 [D]. 长沙: 国防科学技术大学, 2009. |
| [9] | 杨青. 混合砂高性能混凝土的界面区特征与耐久性研究 [D]. 重庆: 重庆交通大学, 2014. |
| [10] | Nmai CK. Aggregates for Concrete [J]. ACI Education Bulletin, 1999: E1-1-26. |
| [11] | Zhou MK, Cai JW, Wang JL, et al. Research on Properties of Concrete Prepared with Artificial Sand Containing Stone Powder at High Content [A]. In: Nai-Qian Feng, Gai-Fei Peng, eds, Procee- dings of Environmental Ecology and Technology of Concrete [C]. Uetikon-Zuerich, Switzerland: Trans Tech Publications Ltd, 2005: 263-268. |
| [12] | Shi Mengxiao,Wang Qiang,Zhou Zhikai.Comparison of the properties between high-volume fly ash concrete and high-volume steel slag concrete under temperature matching curing condition [J]. Construction and Building Materials, 2015, 98: 649-655. |
| [13] | Huajian Li, Fali Huang, Guanzhi Cheng, et al, Effect of granite dust on mechanical and some durability properties of manufactured sand concrete [J]. Construction and Building Materials, 2016(109): 41-46. |
| [14] | 魏晓丹. 高效减水剂对混凝土长期性能的影响 [J]. 福建建材, 2018(12): 26-27. |
| [15] | 王波. 铁尾矿砂与天然砂对混凝土质量影响的研究 [J]. 市政技术, 2016, 34(02): 177-181. |
