fist stage concrete是什么意思

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Some existent problems about construction management of concrete in winter are explored in this paper.

探讨了冬期混凝土施工管理所存在的问题,并提出相应的解决办法。

Construction technique of the second-stage concrete of spiral case under the conditions of heat and pressure preservation;

保温保压浇筑蜗壳二期混凝土的施工技术

This paper discusses the construction technique flow of the second-stage concrete of the spiral case, the concrete pouring of the top buttress of spiral case, base ring and foundation ring bottom and the bottom of spiral case, the construction method and schedule of concrete backfill grouting for the second-stage concrete of spiral case.

对蜗壳二期混凝土施工工艺流程,蜗壳支墩顶部、座环和基础环底部、蜗壳底部混凝土浇筑,蜗壳二期混凝土回填灌浆施工方法以及施工计划和工期进行了探讨,决定采用蜗壳二期混凝土分层分块薄层浇筑方案,并较好的解决了蜗壳位移,变形问题,浇筑完成后基本无脱空现象。

Because early ages of concrete setting and hardening are critical stages of concrete influencing and even controlling cracking resistance and other performances of concrete at later ages, emphases are put on those research situations about the shrinkage and cracking of concrete at early ages, .

由于混凝土凝结硬化的早期是影响并控制混凝土抗裂性和后期性能的关键阶段,因此重点介绍了早期混凝土收缩、强度、弹性模量、徐变等的动态发展过程及这一过程对混凝土开裂趋势和抗裂性能的影响等方面的研究情况。

With a significant varied range at the age of concrete (3 to 54days), the relations between the strength and the age of concrete was neglect.

在天津永基花园工程中的超声波管法检测中，因桩身混凝土龄期变幅很大（3天～54天）。

The gantry to lift concrete and pump concrete are adopted for the second stage concrete placement of No.

三峡左岸电站厂房1#、2#机蜗壳二期混凝土浇筑根据部位不同采用了门机吊运混凝土和泵送混凝土相结合的方式。

Study on Behavior of Early-age Concrete Cracking in Basement Walls;

地下室墙体早期混凝土开裂性能研究

Standard for test method of early reckoning concrete strength

早期推定混凝土强度试验方法

Analysis and Forecast of Concrete Structure Cracking at arly Age

混凝土结构早龄期开裂的分析与预测

Restrained Shrinkage Properties of Reinforced Concrete at Early Age;

钢筋混凝土早龄期约束收缩性能研究

Research on Ultrasonic Testing of the Quality of Early-age Concrete;

早龄期混凝土质量超声检测技术研究

Experimental Study on Early Estimating the Strength of Fly ash Concrete;

早期推定粉煤灰混凝土强度试验研究

Tentative Research on Non-destructive Detection of Concrete Early-age Elastic Modulus;

混凝土早龄期弹性模量无损检测初探

Effects of Curing on Early-age Shrinkage and Cracking of Concrete;

养护对混凝土早期收缩和开裂的影响

Experiment Study on the Concrete Early-age Shrinkage and Anticrack Properity;

混凝土早期收缩与抗裂性能试验研究

Research on the Early Age Cracking Sensitivity of Concrete Doped Steel Slag

掺钢渣混凝土早龄期开裂敏感性研究

Experimental research on initial dry shrinkage properties of general porous concrete

多孔混凝土早期收缩性能的试验研究

STUDY OF SEVERAL ISSUES ON EARLY AGE SHRINKAGE CRACKING OF HIGH PERFORMANCE CONCRETE

高性能混凝土早期收缩开裂问题研究

PREDICTION OF COMPRESSIVE STRENGTH AND PERMEABILITY OF CONCRTE AT EARLY AGES

混凝土抗压强度与渗透性的早期预测

Early damage of asphalt concrete pavement of highway and preventive measures

公路沥青混凝土路面早期损害与防治

Experimental study on the early age anti-cracking performance of fiber reinforced concrete

纤维混凝土早龄期抗裂性能试验研究

Producing and Control of Early Crack of Concrete Structure

混凝土结构物早期裂缝的产生及控制

The research on the crack resistance at early age of concrete pavement in mountainous highway

山区公路混凝土路面早期抗裂性研究

Technical measures of prevention of concrete crack and carbonization

预防混凝土早期开裂及过早碳化的技术措施