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UHPC超高性能混凝土

UHPC超高性能混凝土
UHPC超高性能混凝土是一种超高强、韧性、高耐久性的特种工程材料,在国防工程、海洋工程、核工业、特种保安和防护工程、以及市政工程领域有良好的应用前景。经试验证明,其抗折强度是普通C50混凝土的3倍,缩变下降50%,经历700次冻融循环后仍然完好无损,被称为“永不开裂”的混凝土。

一、产品特点
1、UHPC现已用于海洋石油平台的钢结构的外保护层,可大大提高水位变动区的支柱的使用寿命。
2、UHPC的早期度发展快,后期度极高,用于补强和修补工程中可替代钢材和昂贵的有机聚合物,既可保持混土体系的整体性,还可降低成本。
3、UHPC强度高,抗冲击性能好,可用于国防工程的防护结构,也可用于需要高承载力的特殊结构。
4、UHPC的高密实性与良好的工作性能,使其与模板相接触的表面具有很高的光洁度,外界的有害介质很难侵入到UHPC中去,而UHPC中的着色剂等组分也不易向外析出,利用这一特点可把UHPC用作建筑物的外装饰材料。

二、适用范围
1、利用UHPC强度高的性质,可以减小结构构件尺寸,获得更多的使用空间。利用UHPC可以建造跨度更长、净空更大的桥梁;可以减小高层建筑中底层柱子截面尺寸,得到更多的使用面积。
2、利用UHPC高抗拉强度、耐腐蚀的性质可以制作输油、输气管道以替代造价较高的大口径厚壁钢管,显著提高管道耐久性、降低成本。
3、利用UHPC的高抗渗性,制造中低放射性核废料储存整体容器。
4、用于军事与安保领域,制造抗爆炸、抗冲击装置。
5、现场抢修、结构加固等。

三、性能指标
 

项目

依据

指标

抗压强度(MPa)

试件尺寸40×40×160(mm)

≥150

试件尺寸100×100×160(mm)

≥120

抗拉强度(MPa)

≥9

弹性段抗拉强度(MPa)

≥7

极限抗拉强度(MPa)

≥8

极限拉伸应变(%)

≥0.2

极限抗拉强度/弹性段抗拉强度

≥1.1

抗弯拉强度(MPa)

≥22

初始坍落扩展度(mm)

≥700

1h坍落扩展度(mm)

≥650

备注:每立方原材料重量(不含拌合水)为2250kg

四、施工工艺
1、配合比
粉料:水=10:1
2、搅拌
投入粉料到搅拌机,加水搅拌3~4分钟(物料达到胶体状态),待钢纤维分散后均匀后进行浇筑,并振动成形,*后进行养护。

五、包装贮存
采用牛皮纸袋包装,40kg/袋。

创建时间:2024-08-03 10:20
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