Research on portland cement hydration and mechanical properties of PRC low water cement ratio system

PRC低 水 胶 比体系硅酸盐水泥水化特性与力学性能研究

The hydration degree of Portland cement under the condition of low water cement ratio was tested and the microstructure of hardened cement paste was studied by means of XRD and SEM .

研究了低 水 灰 比硅酸盐水泥的水化程度，并利用XRD和SEM分析了硬化水泥浆体的微观结构。

The shrinkage of the polymer-modified cement paste varies with polymer types filler addition and water cement ratio .

聚合物改性水泥浆体的干燥收缩与聚合物的品种、填料掺量和 水 灰 比有关。

Effects of cement quantity hydration temperature cement fineness water cement ratio gypsum addition and hydration time on the particle weight ( PW ) of CPA were studied . The feasibility of this test method was discussed .

通过研究水泥称量、水化温度、水泥细度、 水 灰 比、石膏掺量和水化时间对结粒量的影响，探讨了该检测方法的可行性。

The effects of recycled aggregate quantity PFA replacing cement quantity PFA over-replacing quantity and water cement ratio on PFA regeneration concrete compression strength were studied .

研究了再生骨料掺量、粉煤灰取代水泥量、粉煤灰超量系数和 水 灰 比对粉煤灰再生混凝土抗压强度的影响。

Study on effect of compressive strength of recycled aggregate concrete with water cement ratio

水 灰 比对再生混凝土强度影响的试验研究

When cement content and water cement ratio are constant the compressive strength of solid mass with medium sand is highest and elastic modulus value maximum orderly fine sand and clayey soil ;

在水泥含量和 水 灰 比一定时，中砂抗压强度高，弹模大，粉细砂次之，粘性土最小；

Factors affecting the filtering and fluidity of filtering concrete such as water cement ratio quantity of cement and quantity of fly ash are analyzed .

研究分析了 水 灰 比、水泥用量、粉煤灰掺量等因素对滤 水混凝土的流动性和滤 水量的影响。

By controlling the range of the dry density magnitude of cement and water cement ratio of mixture the requirement of drainage property and structure strength can be fulfilled .

通过控制混合料的干密度、水泥用量和 水 灰 比的取值范围，可使混合料同时满足排水性能要求和结构强度要求。

The result shows that the sand percentage has more influence on the workability than that on the compressive strength of concrete especially with high water cement ratio in the normal concrete .

结果表明：在普通混凝土中，砂率对混凝土和易性的影响较大（尤其是高 水 灰 比时，对 低 水 灰比的影响很小），砂率对普通混凝土强度的影响很小。

Influence factors of thermal deformation are investigated including temperature water cement ratio age moisture content admixture and mix ratio .

通过该方法，系统研究了 水泥 石线性热膨胀系数的影响因素，包括温度、 水 灰 比、龄期、湿含量、掺合料、配合比等。

The hydration products of stone body under the condition of different water cement ratio and content of fly ash were tested and analyzed by SEM and XRD . ( 4 ) The indoor serous-gravel grouting test have been carried out through the self-made testing equipment .

对不同粉煤灰掺量和 水 灰 比浆液结石体水化产物做了SEM和XRD分析研究。（4）通过自制的试验装置进行了室内浆液&砂石注浆试验。

Flow rate is greater in concrete with lower strength grade higher water cement ratio or higher saturation degree . ( 3 ) The moisture penetration depth theoretical model is obtained based on flow rate model using integral .

强度等级低、 水 胶 比大或者饱和程度大的混凝土中流速较大。（3）对流速模型进行积分运算得到水分渗透深度理论模型。

The rule which the velocity of ultrasonic sound and rebound number of natural and recycled aggregate concrete change with water cement ratio is the same as one of compressive strength of both concrete respectively .

基准混凝土和再生混凝土超声声速和回弹值随 水 灰 比的变化规律与它们抗压强度值的变化规律基本一致。

Tests show that the water-cement ratio steel fiber content and curing conditions on the strength of steel fiber micro cube compressive strength of concrete water cement ratio is the most important factor the smaller the water-cement ratio the more cube compressive strength Large .

试验表明在水胶比、钢纤维掺量和养护条件对高强微细钢纤维混凝土的立方体抗压强度的影响中， 水 胶 比是最重要的影响因素，水胶比越小，立方体抗压强度越大。

Influence of length and amount of carbon fiber water cement ratio curing age and moulding technology on electrical resistivity of carbon fiber cement composite were discussed experimentally .

着重探讨了碳纤维长度与掺量、 水 灰 比、龄期及成型工艺对碳纤维增强水泥基复合材料导电性的影响。

Through the author 's practice of participation in construction of some tall buildings the water cement ratio slump and sand percentage in pump concrete proportioning design were analyzed and the parameters adopted in actual construction were also introduced .

通过作者参与一些高层建筑施工的实践，对泵送混凝土配合比设计中的 水 灰 比、坍落度、砂率等进行分析，并介绍了实际施工时采用的参数。

High water cement ratio during construction and low water cement ratio during solidification are realized .

实现了混凝土 大水 灰 比施工、小水灰比固化。

Hydrated performance and microstructure of portland cement with low water cement ratio

低 水 灰 比下硅酸盐水泥的水化性能和微观结构

The water cement ratio decides concrete 's strength .

水 灰 比决定着混凝土的强度；

Higher quality cement and lower water cement ratio are needed in high strength concrete . In order to improve other performance of high strength concrete admixture and mineral fillers are needed .

高强混凝土一般采用高标号水泥，低 水 灰 比配制，为提高高强混凝土的其它性能，掺入外加剂和掺合料，其早期性能的发展和稳定性必然与普通混凝土有所区别。

Pressure grouting technique decreases the residual water cement ratio of cement stone and improves grouting effects .

压力灌浆能使结石剩余 水 灰 比降低，并提高灌浆效果。

Through experimental measurement chloride diffusion coefficient and water saturation in concrete with different water cement ratio are obtained .

并通过试验测定了不同 水 胶 比混凝土中的氯离子扩散系数以及水分饱和度。

Study on the Harm of High Strength Concrete with Different Water Cement Ratio by the Anaphase Hydration of unhydrated Cement

不同 水 灰 比混凝土中未水化水泥后期水化的危害研究

In cemented filling method to choose a proper water cement ratio is an important work .

在胶结充填采矿法中，选择一个恰当的 水 灰 比是一件十分重要的工作。

In this paper an intellect measure system and the measuring method about water cement ratio of fresh concrete are introduced .

本文介绍了一种智能化的新拌混凝土 水 灰 比快速测量系统、测量原理及系统组成。

This paper study on effects of water cement ratio setting control agents and mineral admixture on the heat of hydration and its rate and mechanism of cement hydration .

本文着重研究了 水 灰 比、各种调凝外加剂以及混合材料对硅酸盐水泥水化放热量和水化放热速率的影响，并讨论了影响水泥水化热的机理。

The effects of water cement ratio cement sand ratio specimen size pre-storage method solution concentration and temperature on the rate of concrete sulfate attack were investigated .

研究了 水 灰 比、胶砂比、试件尺寸、预养方式、溶液浓度及温度对混凝土硫酸盐侵蚀速度的影响。

Filtering concrete is low bleeding concrete with high water cement ratio and high fluidity .

滤水混凝土是一种微泌水、 大水 灰 比、大流动性混凝土。

We studied according to the characteristic of recycled aggregate the mixture proportion design of recycled concrete on the basis of free water cement ratio .

根据再生骨料的特点，对基于自由 水 灰 比再生混凝土的配合比设计进行研究。