用于铺路的卵石混凝土的性能评估:关于Sucre高速公路项目的一项研究
Zhuqing Feng1, Jue Lu2, Simin Liu1
1China Harbour Engineering Co., Ltd., Beijing 100027, China.
Materials (Basel, Switzerland)
|October 26, 2024
概括
玻利维亚 玻利维亚 玻利维亚
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 玻利维亚面临高速公路项目有限的粉碎石供应.
- 当地的石资源丰富,但作为粗料未充分利用.
- 用卵石聚合物确保混凝土的耐用性是一个关键的挑战.
研究的目的:
- 将卵石混凝土与粉碎石混凝土的性能进行比较.
- 研究飞灰对混凝土的水透性阻力的影响.
- 对Sucre高速公路项目的卵石混凝土的适用性进行评估.
主要方法:
- 使用卵石和碎石聚合物对混凝土性能进行比较分析.
- 评估总体特征:密度,散密度,空隙比率和分级.
- 评估混凝土的机械性能:压力强度,屈曲抗拉强度和裂纹抗拉强度.
- 在混凝土上进行含有飞灰的水透性测试.
主要成果:
- 石的密度较低,空隙比碎石更高,具有分散的分级.
- 聚合物类型显著影响分裂拉伸强度;故障模式包括泥破裂,聚合物粉碎和接口解接.
- 聚合物和飞灰对压力强度的影响很小,但对屈曲拉伸强度的影响很大.
- 所有混凝土类型都符合交通负载要求;飞灰增强了不透性,减轻了与聚合物相关的问题.
结论:
- 卵石混凝土表现出可接受的机械性能和高速公路应用的耐用性.
- 添加飞灰可以提高混凝土的水透性阻力,解决聚合物相关的问题.
- 该研究支持在玻利维亚高速公路建设中将当地卵石资源作为粗聚合物的可行使用.
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