基于水工混凝土施工规范的人工砂质量评估标准和生产技术

IF 0.7 4区 材料科学 Q3 Materials Science
Pei Yu, Suqin Gao, Jun Peng
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引用次数: 0

摘要

天然砂石资源属于当地资源。天然砂石在短时间内不可再生,不适合长途运输。经过几十年的开采,一些地区的砂石资源已经枯竭。天然砂石的运输距离越来越远,相应地,天然砂石的价格也不断上涨。同时,连续无序的开采对环境和资源造成了严重破坏。在我国大中型水利水电工程建设过程中,由于周边天然砂石骨料缺乏,大部分工程都采用人工砂石骨料。在现行的水利工程国家标准中,对人工砂石粉的含量有明确规定。本文以《水工混凝土施工技术规范》(SL677-2014)为基础,总结了人工砂的颗粒形状、级配和表面结构,并计算了人工砂的理论级配。为了解石粉含量对人工砂性能的影响,需要选取不同等级的石粉含量进行研究分析,以明确人工砂石粉含量对混凝土性能的影响。研究表明,对于人工砂制成的混凝土,增加粒径小于 0.075 毫米的骨料含量可显著提高混凝土的抗压强度。在人工砂中,石粉含量会影响混凝土的工作性、抛光性、耐久性、渗透性和释水性。在人工砂石生产工艺系统中,破碎和制砂设备是最重要的砂石生产设备。研究成果为人工砂在混凝土中的应用以及人工砂生产技术和设备的更新提供了理论参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quality assessment standards and production technology of artificial sand based on hydraulic concrete construction specifications
Natural sand and gravel resources are a local resource. Natural sand and gravel are non-renewable in a short time and are not suitable for long-distance transportation. After decades of mining, sand and gravel resources in some areas have been exhausted. The transportation distance of natural sand and gravel is getting farther and farther, and accordingly, the price of natural sand and gravel continues to rise. At the same time, continuous and disorderly mining has caused serious damage to the environment and resources. During the construction of large and medium-sized water conservancy and hydropower projects in China, due to the lack of surrounding natural aggregates, most projects use artificial aggregates. In the current national standards for water conservancy projects, the content of artificial sand and gravel powder is clearly defined. Based on the “Hydraulic Concrete Construction Specifications” (SL677-2014), this article summarizes the particle shape, gradation and surface structure of artificial sand, and also calculates the theoretical gradation of artificial sand. To find out the impact of stone powder content on the performance of artificial sand, different levels of stone powder content need to be selected for research and analysis to clarify the impact of artificial sand powder content on concrete properties. Research shows that for concrete made from artificial sand, increasing the aggregate content with a particle size less than 0.075 mm can significantly increase the compressive strength of the concrete. In artificial sand, the content of stone powder will affect the workability, polishability, durability, permeability and water release of concrete. In the artificial sand and gravel production process system, crushing and sand making equipment are the most important sand and gravel production equipment. The research results provide theoretical reference for the application of artificial sand in concrete and the update of artificial sand production technology and equipment.
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来源期刊
Materials Express
Materials Express NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
自引率
0.00%
发文量
69
审稿时长
>12 weeks
期刊介绍: Information not localized
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