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灰比
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  cement ratio
     As blend ratio of product was 0.3%,the cement fluidity improved from 105mm to 151mm when water cement ratio was 0.4.At the addition of 0.3% and 0.6% product,water reduction was 5.5% and 9%.
     反应改性物在掺量0.4%、水灰比0.4条件下,水泥净浆流动度由基准的105mm提高到151mm。 当改性物掺量在0.3%时,减水率为5.5%,而掺量达到0.6%时,减水率升高到9.0%。
短句来源
     The fluidity of cement paste can attain as high as 265mm at the dosage of 0.3% and the water to cement ratio of 0.26.
     在折固掺量为0.3%,水灰比为0.26时,水泥净浆流动度高达265mm。
短句来源
     1D,2D and 3D carbonation are studied on different water to cement ratio(0.3,0.35,0.4) and different fly ash proportion(0%,15%,20%,40%,60%);
     研究了不同水灰比(0.3、0.3 5和0.4),不同粉煤灰掺量(0,1 5%,2 0%,4 0%,6 0%)下混凝土二维和三维碳化深度;
短句来源
     ③optimal logging time delay 2~3 hours when cement retarder increases 0 2% under the same temperature and same water cement ratio;
     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;
短句来源
     Applying the formula of flexural strength with water/cement ratio and the experience value of water and sand by study, this paper put forward the mixed design method of lean concrete for road base.
     在普通砼配合比设计方法基础上,应用研究所建立的抗弯拉强度水灰比公式以及用水量、砂率等参数的经验取值,提出了以抗弯拉强度为设计指标的贫砼配合比设计方法,为施工中材料的选择与组成设计提供了切实可行的方法。
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  binder ratio
     The test results demonstrated that with the same water to binder ratio (0.45) and cement to sand ratio (1∶3), the incorporation of 0.214%~1.071% KOH and 0.42% NaOH leaded to an increase in loss of weight and free shrinkage of cement mortar.
     结果表明,在相同水灰比(0.45)和灰砂比(1∶3)条件下,掺入0.214%~1.071%(质量分数,下同)KOH和0.42%NaOH增加了砂浆的水分损失和早期收缩。
短句来源
     The effect of water binder ratio (W/C), slag binder ratio (S/C) as well as the adding quantity of steel fiber on cement based composite was studied;
     研究了水灰比 (W/ C)、砂灰比 (S/ C)、钢纤维掺量对水泥基复合材料性能的影响 ;
短句来源
     C80 high strength and high fluidity concrete can be prepared by using water binder ratio ranging from 0.29 to 0.30, 10%~30% of Li by product inner added, the quantity of water applied no more than 170kg/m 3 and the adding quantity of NF 2 6 water reducing agent no less than 1.5%.
     水灰比在029~030范围内,内掺10%~30%的Li渣,用水量不多于170kg/m3,NF26减水剂的掺量不小于15%,可配制出C80高强度大流动性混凝土;
短句来源
     The charge passed of concrete with different water/binder ratio and different kind of mineral admixtures were measured according to ASTM C1202,and the factors influencing the value analyzed.
     本文利用ASTMC1202标准,测量了不同水灰比下掺与不掺矿物质混合材的混凝土6小时总导电量,并对影响混凝土导电量的因素进行了具体分析。
短句来源
     The orthogonal experiment has been carried out to study the effects of the water to binder ratio,the fly ash displacing cement ratio,the exceeding coefficient and the sand ratio on the workability and the twenty-eight-day compressed strength of the concrete composed of the manufactured sand and the fly ash.
     通过正交试验研究了水灰比、粉煤灰替代水泥率、超量系数和砂率对人工砂粉煤灰混凝土工作性及28 d抗压强度的影响规律.
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  “灰比”译为未确定词的双语例句
     Concretion with compression strength of 1.2~ 5.3 MPa after 7days and 2.5~ 10 MPa after 28days respectively was obtained when the water-solid ratio was 1∶1.0 ~1∶1.5 and the fly-ash addition was equal to or greater than 70%.
     试验得到当水灰比为1∶1.0~1∶1.5,粉煤灰掺量27%时,结石体的7 d抗压强度为1.2~5.3 MPa,28 d抗压强度为2.5~10 MPa。
短句来源
     The main technology parameter for manufacturing straw-cement board ratio of straw and cement is 1∶6,ratio of water and cement is 0 4∶1 and CaCL 2 is 7%.
     制作麦秸水泥板主要工艺参数为 :秸灰比 1∶ 6 ,水灰比 0 .4∶ 1,Ca Cl2 为 7%。
短句来源
     When water-cement ratio of W/C=1.0:0.3, W (PCS-1) =0.5%, the fluidity of cement grout reached 32.8cm, while air-content of concrete only was 2.8%, water-reducing ratio was33.2%, slump conservation rate was 92%~97% during one hour, and 28 d compressive strength ratio of concrete adding PCS-1 was 167%.
     当水灰比W/C=1.0∶0.3,PCS-1的掺量为0.5%时,水泥净浆流动度32.8cm,混凝土含气量2.8%,减水率33.2%,1h坍落度保持率为92%~97%,28d的抗压强度比达到了167%。
短句来源
     Through the test data of CF40 concrete when the ratio of water and plaster is 0.41,the relation of antipressure and sand rate is analyzed when the the mixing amount of steel fiber is 0.2%,0.4%,0.6%,and 0.8%,and the rational sand rate can be determined under the different steel fiber mixing amount.
     通过CF40混凝土在水灰比为0.41时的试验数据,分别对钢纤维掺入量为0.2%、0.4%、0.6%、0.8%时的抗压和砂率的关系进行分析,确定在不同钢纤维掺入量情况下的合理砂率。
短句来源
     The orthogonal text suggested that the optimal technological parameters were: NaCl-fly ash ratio was 1 ∶ 20,calcination temperature was 900 ℃,acid-fly ash ratio was 3 ∶ 1;
     经正交试验确定优选的工艺参数为盐灰比1∶20,煅烧温度900℃,酸灰比3∶1。
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  cement ratio
The thickness of ITZ reduces slightly with the decrease in water/cement ratio.
      
Cementation of the slurries in the slurry/cement ratio of 0.3-0.7 was tested.
      
Fracture energy of Mode I (opening mode) for the Ordinary and Low-Heat Concrete is compared and examined according to experimental variables, such as water-cement ratio, compressive strength and age.
      
Test results show that the deflections at the fracture was decreased as the fracture strength were increased and the reduction of water-cement ratio caused to increase fracture energy in both specimens.
      
In order to improve the grouting quality, the water-cement ratio and discarding time of slurry should be controlled precisely.
      
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  binder ratio
The parameters of model can explain the effect of pore structures or water to binder ratio on frost durability of concrete.
      
Effects of water to binder ratio (mW/mB), types and addition content of mineral admixtures on the autogenous relative humidity (ARH) change of concrete resulting from self-desiccation were studied.
      
The parameters of coefficient of mineral self-desiccation-effect k and efficient water to binder ratio re were proposed, and experimental results were fitted non-linearly and analyzed using these proposed parameters.
      
The experimental results indicate that water-binder ratio evidently influences the corrosion fatigue characteristics of HPC, and a moderate quantitative fine mineral admixture enhances the corrosion fatigue resistance of HPC.
      
The concrete mixtures in series I had a water-to-binder ratio and a cement content of 0.55 and 410 kg/m3, respectively.
      
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磨子潭水库是淠河上游的一个水库,在佛子岭水库以上,水库的任务是防洪和发电,总库容2.88亿公方,水电装机16,000瓩,年度能6,102万度,防洪方面配合佛子岭溢洪道扩大工程可保障佛子岭壩身千年一遇洪水不漫顶。控制流域面积670平方公里,枢纽工程有大体积肋墩壩一座,计划壩长343公尺,最大壩高约80公尺,隧洞一道,溢洪道一座,水电钢管一道及水电站一座,水库工程从1956年开工,目前正在浇筑壩体混凝土.大体积肋墩壩是一种比较新型的支撑壩,迄今仅有50多年历史,据我们现有资料统计,世界上已建成的约有30余座,最高者为110公尺,这种壩型的构造型式和结构性能在重力壩和薄型支撑壩(如连拱壩,平板壩)之间,也具备两者的优点,是一种很有前途的壩型。在进行大体积肋墩壩设计之初,先要选定各个肋墩的主要尺度,包括:(1)挡水面宽度,(2)上下游面坡度和(3)断面尺寸等三项,按照在同时满足稳定和应力的要求下,使整个壩的总造价为最小的原则来进行选择;挡水面的宽度宜尽量增大,但应考虑肋墩头部混凝土的温度和收缩影响。断面尺寸的最小厚度,应能满足抗渗耐久、施工以及国防的要求。上下游面坡度与肋墩断面尺寸或体积数量有关,应由稳定,应力及经济...

磨子潭水库是淠河上游的一个水库,在佛子岭水库以上,水库的任务是防洪和发电,总库容2.88亿公方,水电装机16,000瓩,年度能6,102万度,防洪方面配合佛子岭溢洪道扩大工程可保障佛子岭壩身千年一遇洪水不漫顶。控制流域面积670平方公里,枢纽工程有大体积肋墩壩一座,计划壩长343公尺,最大壩高约80公尺,隧洞一道,溢洪道一座,水电钢管一道及水电站一座,水库工程从1956年开工,目前正在浇筑壩体混凝土.大体积肋墩壩是一种比较新型的支撑壩,迄今仅有50多年历史,据我们现有资料统计,世界上已建成的约有30余座,最高者为110公尺,这种壩型的构造型式和结构性能在重力壩和薄型支撑壩(如连拱壩,平板壩)之间,也具备两者的优点,是一种很有前途的壩型。在进行大体积肋墩壩设计之初,先要选定各个肋墩的主要尺度,包括:(1)挡水面宽度,(2)上下游面坡度和(3)断面尺寸等三项,按照在同时满足稳定和应力的要求下,使整个壩的总造价为最小的原则来进行选择;挡水面的宽度宜尽量增大,但应考虑肋墩头部混凝土的温度和收缩影响。断面尺寸的最小厚度,应能满足抗渗耐久、施工以及国防的要求。上下游面坡度与肋墩断面尺寸或体积数量有关,应由稳定,应力及经济等各项比较计算确定,在初步比较时,肋墩挡水面宽度对肋墩基本断面的厚度的比值 S 应根据肋墩的最大高度,最小厚度及最大挡水面宽度而定。上下游面坡度对体积数量的关系,可利用肋墩的基本断面(即假定肋墩为一平均等厚三角形断面)来计算,按照不同的 S 值在满足稳定和上游面不发生拉应力的条件下可直接定出最小的体积数量和相应的上下游面坡度,再作进一步断面尺寸的比较。经过比较,磨壩采用的各项尺度,按最大挡水面宽度18公尺,肋墩最小厚度2.8公尺选定结果为:上游面坡度在壩高80~20公尺为1∶0.5,20~10公尺为1∶0.4,10公尺以上为1∶0.3,下游面坡度为1∶0.4,断面尺寸(详见图7断面Ⅲ)大体积肋墩壩的稳定分析包括(1)抗滑稳定的核算(2)横向地震时倾复稳定和应力的校核(3)肋墩横向自由振动周期的计算(4)肋墩抵抗纵向弯曲的计算,磨壩稳定分析成果为:(1)抗滑稳定安全系数的最小值,Kc=1.0(f=0.7,c=0);K′_c=4.44(f_o=0.65,c=31公斤/公分~2);K_щ=1.03(谢尔康诺夫计算法);Kck=1.56;(2)抗横向倾复安全系数的最小值 K_o=5.40,横向地震时肋墩底部正应力σYmin1.20公斤/公分~2(压应力),(3)肋墩横向自由振动周期(最大值)T_o=0.366秒(E=2.6×10~6公斤/公分~2),0.466秒(E=1.6×10~6公斤/公分~2)(4)抗纵向弯曲安全系数(取壩高20公尺处平行下游面的截取断面)ξ=9.4。大体积肋墩壩的应力分析是研究各个肋墩内应力分布的情况,肋墩的应力分析严格地说应该是一个三向的问题。目前一般将肋墩分成若干个平面问题来研究,一为肋墩在与壩轴垂直的平面问题(即壩身侧向断面),一为与上述平面相正交,垂直于上游面的平面问题,前者用以研究肋墩平面的应力,后者则为研究肋墩头部的应力。肋墩平面的应力分析一般采用(1)应力函数法(2)几何法和(3)简捷法,磨壩采用简捷法分析。肋墩头部的应力采用应力函数法的有限差分方程计算,(即纲格法)。磨壩肋墩平面应力分析结果。肋墩内最大第一主应力在壩高80公尺(下游面)为28.7公斤/平方公分,最小第二主应力在壩高80公尺(肋墩中部)为-2.3公斤/平方公分。最大主切应力为14.53公斤/平方公分。壩体施工原来是用隧洞一期导流,但由于隧洞开工时间较迟,来不及待它鑿通后再进行围壩合龙闭气和壩基清理,后来改用三期导流的办法,第一第二期是在左右各半个河床内导流,第三期是在壩身内预留的二个底孔和隧洞中导流。这样就使得壩基土方石方的开挖和混凝土的浇筑有可能可以分区进行交义作业,大大提前了施工的进度。壩基开挖都采用鑽孔爆炸,最后用人工将震裂松动的石块全面加以剥除整修。壩基的土方工程由于二山复盖层很厚,最深处达18公尺,为加速风化土石层的开挖曾采用小型洞室爆破,效果良好,并不影响壩的基础,混凝土粗骨料采用河床中的卵石,最大粒径采用150公厘,河水经化验有浸蚀性,故渗加白土混合材。~#500普通水泥中掺加20%,仍能满足强度,抗冻(M_(30))抗渗(B_9)的要求。水泥加混合材在每公方混凝土中的用量~#170(九十天强度)为160公斤,水灰比为0.65。~#140(九十天强度)为149公斤,水灰比为0.7。混凝土熟料均用小矿车输送,壩身下面20公尺高部分全用排架桥向下翻倒浇筑,排架以上部分用钢塔升高,二山坡用卷扬道,二山顶则另有拌和场,壩身混凝土的最高日浇筑量为25,00公方,最高月浇筑量为45,000公方,从1956年12月起开始浇混凝土到1957年7月水库可起拦洪作用.

From the physical point of view, the strength of cement paste is determined by the amount of hydration products and porosity. Paste of excessively high original W/C ratio. though yields a greater amount of hydration products, has a higher capillary porosity and is, therefore, lower in strength. The strength of hardened cement paste varies linearly with the gel-space ratio is true only as regard to pastes of various ages but not with pastes of different W/C ratios. Nor is the ratio of the amount of water of monolayer...

From the physical point of view, the strength of cement paste is determined by the amount of hydration products and porosity. Paste of excessively high original W/C ratio. though yields a greater amount of hydration products, has a higher capillary porosity and is, therefore, lower in strength. The strength of hardened cement paste varies linearly with the gel-space ratio is true only as regard to pastes of various ages but not with pastes of different W/C ratios. Nor is the ratio of the amount of water of monolayer adsorption Vm to the amount of combined water W_n, i. e., V_m/W_n a fixed values thoroughout the period of hydration. The rate of increase in W_n is greater at earlier ages, whereas the rate of increase in Vm is greater at later ages. Crystal hydration products act as skeletal element of the structure of the paste, whereas the colloidal hydration products of the later ages adds to the strength of the structure by filling the interstices of the already formed structure. The authors derive differentconclu-sions with regard to the relation between gel-space ratio and strength of hardened cement as well as the Vm/Wn ratio pastulated by T. C. Powers.

决定水泥石强度的主要因素是水化物生成量和水泥石的致密度。过大的水灰比,虽然有利于水化物的增长,但同时增加水泥石的剩余毛细孔容积,对强度不利。对固定原水灰比的不同龄期的水泥石来脱水泥石的强度与胶/空间比值成一定的直线关系,只是,原始水灰比不同的水泥石,即使胶/空间比值相同,强度也不会相等的。水化过程中单分子层吸附水量V_m与化学粘合水量W_n的比值即Vm/W_(22)也不是—个恒定值,水化早期W_n增长较快,而水化后期V_m增长较快。晶体水化物起着水泥石结构的骨架作用,后期生成的胶体水化物则是填充已经形成的结构的间隙空间,增加了水泥石的强度。关于强度与胶/空间比值的关系和V_m/W_n的比值,作者与T.C.Powers提出了不同的观点。

The investigation deals with the inflences of the various factors, such as percentage of admixture of PVAc emulsions, curing conditions, water-cement ratio etc., on the mechanical properties of the mortars, as well as the water resistance of the mortars.

本文研究了聚醋酸乙烯乳液的掺入量、养护条件、水灰比等因素对聚醋酸乙烯水泥砂浆性质的影响,以及砂浆的抗水性能。试验结果表明,聚醋酸乙烯乳液的掺入量以占水泥的的15%(以干科计算)左右最好,砂浆的抗折强度可提高一倍以上,抗压强度可增加8%左右。聚醋酸乙烯水泥砂浆的养护条件与普通水泥砂浆的要求不同,它应在较低相对湿度和较高温度下养护,才能充分发挥其强度。聚醋酸乙烯水泥砂浆的强度随水灰此减小而增加。聚醋酸乙烯水泥砂浆的抗水性较素水泥砂浆小很多。为了提高聚醋酸乙烯水泥砂浆的抗水性,采用了十余种不同的聚醋酸乙烯共聚物乳液进行了试验。试验结果表明,以丙烯酸丁酯醋酸乙烯共聚物代替聚醋酸乙烯可以使砂浆的抗水性大大提高,同时共聚物中丙烯酸丁脂的含量以5%为最佳。

 
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