水灰比

利用ISO法检验复合水泥、粉煤灰水泥时固定水灰比引起的思考

Considering for stationary water-cement ratio in testing compound cement and fly ash cement by ISO code

为了评价收缩测试的合理性，文中选取水灰比为0.3的几组试样，采用压汞试验，测试其3d龄期气孔分布。

In order to evaluate the reasonableness of this method , this paper selected groups of samples for mercury test , whose water-cement ratio is 0.3 , and got the pore-size distribution of 3 day-aged samples .

论文还从提高混凝土的密实度方面入手，通过降低水灰比（W／C）进行研究，证明降低水灰比（W／C）能提高混凝土的耐腐蚀性能。

This paper also deals with the concrete density , from which a conclusion is draw that the reduction of W / C can improve the concrete corrosion-proof performance .

养护时间少于24h的非引气灌浆材料在各个水灰比下均存在较大的结冰压；

When non-air-entrained grout mixture is cured less than 24 h , a comparatively great pressure would come as a result .

结果表明，密度（D）对板材性能影响最大，木灰比（W/C）次之，水灰比（W1/C）最小；

The results showed that among the density , wood / cement ratio , water / cement ratio , density had the largest influences on board ′ s properties ;

而且随SAP掺量提高，效果继续增强，尤其是在干热环境以及低水灰比混凝土，SAP的作用更好。

These effects were strengthened with the increase of SAP addition and they were eminent in HPC with the low water-cement ratio in the dry hot curing condition .

水灰比、灰砂比和UEA对石屑砂浆干燥收缩性能的影响

Effects of Water-Cement RatioC 、 ement-Aggregate Ratio and UEA on Drying Shrinkage of Stone Chips mortar

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 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 .

3对同一温度同一水灰比，缓凝剂增加0.2%，最佳测量时间延迟2～3h；

Optimal logging time delay 2 ~ 3 hours when cement retarder increases 0 2 % under the same temperature and same water cement ratio ;

2对同一水灰比同一缓凝剂，温度每升高10℃，最佳测井时间缩短约2h；

Optimal logging time reduces about 2 hours when the temperature increases 10 ℃ under the conditions of the same water cement ratio and same cement retarder ;

以水灰比m（w）/m（c）表示（包含石膏中的水），当石膏质量分数由0增至30%时，典型矿物完全水化的化学需水量大约在0.37～0.62之间。

Expressed as a m ( w ) / m ( c )( including gypsum ), the CWD for complete hydration of a typical clinker ranges from approximately 0.37 to 0.62 as gypsum contents increase from 0 to 30 % .

结果表明，水灰比越低，砂浆抗TSA侵蚀性能越好；

The results show that the resistance of mortar to thaumasite form of sulfate attack ( TSA ) increases with the reduction of water-cement ratio .

研究结果表明，代用ISO标准砂的材质和颗粒形状不同，使相同水灰比和胶砂比的水泥胶砂的用水量和强度表现各异。

The research sults reveal that the water demand and the strength at the same water / cement ratio and cement / sand ratio differ with the quality and particle shape of the substituted ISO standard sand .

结果表明，轻骨料混凝土的水分蒸发量随水灰比增大而增大，且蒸发速率在2h左右出现最大值。

The results suggested that the water evaporation quantity in the concrete became larger with the increase of w / c , and water evaporation velocity reached maximum value around two hours .

推荐的固化配方为：水灰比1.0～1.1，盐灰比0.18～0.20，及占水泥重量0.5%（wt）的水泥高效缓凝减水剂。

The introductive solidification parameter was water to ash ratio 1.0 ~ 1.1 , salt to ash ratio 0.18 ~ 0.20 and retarding reduce hydrate addition was 0.5 % ( wt ) of cement .

主要研究了水灰比m（w）/m（c）和硅灰对高性能混凝土（HPC）自收缩率和内部湿度的影响，并对自收缩机理进行了理论探讨。

Effects of m ( w ) / m ( c ) ratio and silica fume on the autogenous shrinkage and internal relative humidity of high performance concrete ( HPC ) were mainly investigated . Self_desiccation mechanisms of HPC were also analysed .

本文通过掺加高效减水剂、降低水灰比、掺加磨细矿渣和硅粉配制了C80高强混凝土（HSC）。

Here the HSC of SOMPa is achieved through adding super-effective water reducer , fined slag and silicon fume , and decreasing the water / cement ratio .

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。

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 .

测试结石体在不同龄期时的强度，对比固化温度、固化剂掺量、PS模数、PS浓度以及水灰比等因素对结石体强度的影响。

The mechanical strength of PS-F grouting material is tested at different age and the effect of factors , such as curing temperature , amount of sodium fluosilicate , modulus of PS , concentration of PS and water-ash ratio to strength is also discussed .

研究了不同水灰比的掺石灰石粉水泥砂浆在低温硫酸盐溶液中长期浸泡后的外观、强度与矿物成分变化过程，分析了水泥砂浆受TSA侵蚀后的宏、微观性能演变规律。

Limestone filler cement mortars with different water-cement ratios were immersed in sulfate solutions at a low temperature for a year , and their appearance , strength and mineral composition were measured at different immersion ages .

在此基础上，又研究了不同水灰比条件下，JA速凝剂对铁铝酸盐水泥凝结时间的影响情况，同时探索了该速凝剂对铁铝酸盐水泥强度的影响规律。

Based on this result , the effect of the JA accelerating agent on the cement setting time is analyzed under different water cement ratios , and the rules governing such effect are also presented .

采用30min混凝土强度快速推定和15min快速测定新拌混凝土水灰比，以便于施工中尽早发现混凝土质量问题，减少误浇次品混凝土所造成的损失。

In order to discover quality problem of concrete early and avoid loss , determining water-cement ratio within 15 min and deducing concrete strength within 30 min are adopted .

非引气灌浆材料及水灰比大于0.32的引气灌浆材料在15℃下养护24h或5℃下养护40h，其结冰压有较大幅度的降低；

The icing pressure of non - air-entrained grout mixture and air-entrained grout mixture with the m_w / m_c larger than 0.32 substantially decrease when they are cured 24 h at 15 ℃ or 40 h at 5 ℃ .

以无侧限抗压强度和试样成本为考核指标，得出水泥土试样在28d和90d时水泥掺入比、添加剂掺入比和水灰比的最佳组合，为实际工程提供有价值的参考。

The optimum combination of cement-mixing ratio , additive-mixing ratio and water-cement ratio is obtained according to the unconfined compression strength and sample cost , and can act as a valuable reference for practical projects .

结果表明：最佳制板工艺参数为：CO2气体压力0.7MPa，通气时间3min，木灰比0.2（毛白杨）或0.5（落叶松），水灰比0.35（毛白杨）或0.4（落叶松）；

The results showed as follows : ( 1 ) The optimum technological parameters of manufacturing CBP were CO 2 gas pressure of 0.7 MPa ; injection time of 3 minutes ; particle / cement ratio of 0.2 ( poplar ) or 0.5 ( larch );

为了研究交河故城保护灌浆加固材料，在不同水灰比PS-C浆液实际灌浆过程中，对不同裂隙的渗透能力及灌注效果做了初步探讨。

In order to study the influence of PS-C grout with different C / W ratios on its groutability to different fractures of Jiaohe ruins , the grouting pressure and effects are discussed .

试验研究了水灰比0.35，纯水泥、矿粉取代水泥50%和粉煤灰取代水泥30%三个配合比混凝土0-7d电阻率变化。

The experiments studied the 0-7d electrical resistivity development of the concrete which is made out of three mixes : water-cement ratio 0.35 , cement only mixed , 50 % cement replace with slag mixed and 30 % cement replace with fly ash mixed respectively .

混凝土水灰比的影响因素

Infection Factors of Ratio for Concrete , Water and Fly Ash

低水灰比水泥浆液搅拌特性试验研究

Experiment study of mixing quality for low ratio of water-cement grout

4温度、水灰比、缓凝剂都是单独起作用，相互不受影响

Temperature , water cement ratio and cement retarder act independently