湖北省十堰市超高性能混凝土幕墙厂家直供

时间:2021-07-25 13:37:17

湖北省十堰市超高性能混凝土幕墙厂家直供48g3

湖北省十堰市超高性能混凝土幕墙厂家直供

UHPC定义

  

ASTM C1856-2017[1]


Ultra-high performance  concrete—a cementitious mixture that has a specified compressive strength of at least 120MPa [17000psi], generally containing fibers and has other properties measured by standard test methods that comply with specified durability, ductility and toughness requirements.

  

超高性能混凝土-指抗压强度不低于120MPa[17000psi] 的水泥基材料,通常包含纤维,并满足规定的耐久性、延性和韧性要求。

  

This practice is applicable to UHPC with aspecified compressive strength of at least 120MPa (17000 psi), with nominal maximum size aggregate of less than 5mm [1/4in.] and a flow between 200 and 250 mm [8 and 10in.] as measured by the modified flow table test described in Section 6.

  

本标准适用于抗压强度不低于120MPa(17000 psi)、骨料大粒径小于5mm [1/4in]、且由第6节所述的改进跳桌试验所测得的扩展度在200和250 mm [8和10in.]之间的UHPC。

  

注1:该标准重在规定取样、制样及性能测试标准。试图尽可能采用现有的相应标准,只给出必要的适合于UHPC材料的新规定。

注2:需要注意的有两点:(1)抗弯试件需因纤维长度不同而变;(2)提示抗氯离子渗透性能试验结果可能测不到或落入试验误差范围内。

  

湖北省十堰市超高性能混凝土幕墙厂家直供
湖北省十堰市超高性能混凝土幕墙厂家直供

ACI 239R-2018[2]:

  

Ultra-high-performance concrete—concrete that has a minimum specified compressive strength of 22,000 psi (150MPa) with specified durability, tensile ductility and toughness requirements; fibers are generally included to achieve specified requirements.

  

超高性能混凝土—抗压强度不低于22,000 psi(150 MPa)的混凝土,兼具规定的耐久性,延性和韧性要求;通常包含纤维以达到规定的性能要求。

  

Ultra-high-performance concrete (UHPC) is aclass of advanced cementitious materials with greater strength, tensile ductility, and durability properties when compared to conventional or even high-performance concrete. For the purposes of this document, UHPC is limited to concrete that has a minimum specified compressive strength of 22,000psi(150MPa) with specified durability tensile ductility and toughness requirements; fibers are generally included to achieve specified requirements. UHPC typically exhibits elastic-plastic or strain-hardening characteristics under uniaxial tension and has a very low permeability due to its dense and discontinuous pore structure.

  

与传统或高性能混凝土相比,超高性能混凝土(UHPC)是一类的水泥基材料,它具有更高的强度,延性和耐久性。本文指抗压强度不低于22,000 psi(150 MPa)的混凝土,并满足规定的耐久性,延性和韧性要求;通常包含纤维以实现规定的性能要求。UHPC通常在单轴拉伸时呈现出弹塑性或应变硬化特性,因其致密和不连续孔结构而具有非常低的渗透性。

  

注3:如果跟踪过ACI 239分会技术报告的多个中间撰写版本的话就会知道,北美在对UHPC的低抗压强度(包括抗拉强度等)规定上也几经变化。

湖北省十堰市超高性能混凝土幕墙厂家直供
湖北省十堰市超高性能混凝土幕墙厂家直供


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