论文部分内容阅读
一、制定背景及意义在水泥混凝土集料中,对于(4.75～37.5)mm之间的粗集料针状、片状颗粒尺寸,主要采用针状规准仪和片状规准仪通过测量筛选。目前国内涉及针状、片状规准仪的标准主要有国家标准GB/T14685-2011《建设用卵石、碎石》、原建设部行业标准JGJ52-2006《普通混凝土用砂、石质量及检验方法标准》、原交通部行业标准JTG E42-2005《公路工程集料试验规程》(T0311-2005水泥混凝土用粗集料针片状颗粒含量试验),上述3项标准主要描述了水泥混凝土集料及建设
First, the development of the background and significance In the cement concrete aggregate, for (4.75 ~ 37.5) mm between the coarse aggregate acicular, flaky particle size, the main use of needle gauge and sheet gauge through the screening . At present, there are mainly national standards GB / T14685-2011 “pebbles for construction” and “JGJ52-2006” standard for construction industry of the Ministry of Construction. The quality of sand and stone for ordinary concrete and its test methods Standard “, the former Ministry of Transportation Industry Standard JTG E42-2005” Highway Engineering Aggregate Test Procedures "(T0311-2005 for cement concrete coarse aggregate needle tablet particle content test), the three major standards described in the cement aggregate and construction