• The key of temperature field analysis in massive concrete is the model for hydration heat of cement.

    大体积混凝土结构水化温度分析关键混凝土水泥水化反应放热模型的确定。

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  • Effect of fly ash on the workability, strength and hydration heat of high belite cement and concrete.

    粉煤灰贝利水泥混凝土工作性强度水化影响。

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  • During concrete winter construction, the hydration heat of cement can be made use of as a sort of energy.

    冬季混凝土施工中,水泥水化可以利用能源。

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  • During the mass concrete construction in bridge structure, the cement hydration heat is easy to cause surface cracking.

    大体积混凝土桥梁施工过程中,由于水泥水化容易引起表面裂缝。

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  • Reduction of the hydration heat during cementation of radioactive resins can reduce thermal stresses and prevent thermal cracks.

    降低放射性废树脂水泥固化水化可以降低温度应力减少裂纹

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  • The types of those cracks are summarized as three kinds: plastic shrinkage cracking, dry shrinkage cracking and hydration heat cracking.

    将引起混凝土裂缝类型归纳塑性收缩开裂干燥收缩开裂 ,水化热开裂 ,并对其表象及成因进行了阐述。

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  • In mass concrete construction, the structural cracks by cement hydration heat will influence the durability and mechanical properties of concrete.

    大体积混凝土施工中由于水泥水化等多种因素产生混凝土结构裂缝影响混凝土耐久性能力学性能

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  • The changes of hydration heat and resistivity of pastes during cement hydration were tested, and their hydration and resistivity rates were also compared.

    测定了不同水泥水化放热电阻变化做了电阻率变化率和放热速率对比分析。

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  • The early cracking of concrete is usually caused by dry shrinkage, autogenous shrinkage of cement hydration and thermal-strain by hydration heat of cement.

    混凝土早期开裂主要由于混凝土失水所产生的干燥收缩水泥水化所产生混凝土收缩以及水泥水化所产生的温度应变所引起。

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  • The results show that AS cement possesses high early strength, low hydration heat and durability, but its shrinkage rate is higher than that of portland cement.

    结果表明,碱-矿渣水泥具有、高强、水化热和耐久性等优良性能,但是较大

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  • For massive concrete construction, the low hydration heat cement like the slag Portland cement is often used to facilitate temperature rise control in the concrete.

    大体积混凝土施工时常选用水泥水化矿渣硅酸盐水泥以利于混凝土温升控制

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  • A new formula was proposed to simulate the hydration heat of cement in concrete. The model takes the influence of temperature and concentration of reactant into account.

    提出考虑温度化学反应物浓度影响混凝土水泥水化反应放热模型

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  • The rate of hydration heat evolution and hydration heat of the PC-CS-A system were tested, and the influence of the composition on the heat of the hydration were analyzed.

    测试了PC-CS-A 复合体系水泥水化热量水化放热速率分析了组成对水化放热行为的影响

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  • The hydration heat of cement paste was tested to investigate the influence of sulfate content in cement paste on the compatibility of cement and naphthalene superplasticizer.

    同时测定水泥浆水化放热,确定水泥浆体硫酸盐含量水泥萘系减水剂相容性影响

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  • The problem of cracks, which is caused in structures by deforming effect, such as hydration heat, shrinkage, temperature difference of atmosphere, is very important and complicated.

    由于变形作用(水化收缩气温)引起工程结构裂缝很复杂重要问题

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  • High Performance cementitious material is specially used for high Performance concrete. Propetties of that are high strength, low water demand, low hydration heat and low shrinkage.

    高性能胶凝材料主要用于高性能混凝土,具有强度需水量水化缩小等特点。

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  • According to the temperature dropping curves of hydration heat, authors also consider the equivalent temperature variation of thermal stress due to the hydration reaction of the cement.

    考虑一般情况下水化降温曲线,求得构件在水化热反应过程温度应力等效温差

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  • The hydration heat of massive concrete does not emanate easily, so the internal temperature will be very high which will generate high thermal stress, then the temperature crack will appear.

    体积混凝土水化容易及时散发内部温升将会很高从而产生很大温度应力,导致出现温度裂缝

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  • Mineral blend can markedly reduce the hydration heat and the hydration exothermic rate, and postpone the arrival time of the highest temperature, particularly the double adding and tri adding.

    矿物合料加入明显降低水化、水化放热速率推迟达到最高温度时间尤其是掺、三掺时降低效果更为显著。

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  • In the mass concrete construction in cement plants, cracks in the concrete may be controlled by reducing the hydration heat and cooling with water to control the internal and external temperature.

    水泥厂工程体积混凝土施工过程中,可以通过降低水泥水化热和冷却水冷却,控制混凝土内外温差等措施控制大体积混凝土有害裂纹产生。

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  • The study of hydration heat exhibits that the hydration rate of alkali-activated metakaolin slag slag-based geopolymer is accelerated leading to an increase of early hydration heat by doping resin.

    水化研究表明:有机树脂掺入加速了碱激发偏高岭土-矿渣基地质聚合物水化速率表现早期水化热增加

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  • The mixture ratio of C40 Marine high performance concrete is optimized through test of the hydration heat of binding material, slump, chloride ion diffusion coefficient, anti-crack rand of concrete.

    通过测试胶凝材料水化混凝土坍落度离子扩散系数、抗等级等性能C40海工混凝土的配合比进行了优化设计。

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  • The results show that the early strength and the permeability of concrete can be improved effectively, and the hydration heat can be reduced and the hot peak value at the early age can be postponed.

    结果表明加激发剂有效改善大掺量粉煤灰混凝土早期强度问题,而且可以降低水泥水化的同时,延缓混凝土早期放热峰值的出现,使混凝土具有良好的抗性能。

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  • For mass concrete construction, cement caused by hydration heat of concrete pouring temperature and internal stress of dramatic changes in temperature, is the main reason for cracks in concrete occur.

    对于大体积混凝土建筑水泥水化引起混凝土浇筑内部温度温度应力剧烈变化导致混凝土发生裂缝主要原因

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  • The cooling pipe, using circling cooled water to reduce the heat of hydration in concrete DAMS, is the most efficient method for temperature controlling in concrete DAMS.

    混凝土利用冷却水管中循环冷水降低混凝土内部水泥水化温升,混凝土坝温度控制有效措施

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  • As for hydraulic tunnel lining concrete, thermal stress is one of important factors that cause concrete cracks, due to the heat of hydration of cement in the construction period.

    对于水工隧洞衬砌混凝土施工期由于水泥水化作用,温度应力影响显著,产生混凝土结构裂缝重要原因之一

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  • This paper obtained the temperature effect caused by heat of hydration in hollow thin pier by thermal-stress analysis, considering the change of elastic modulus followed by time.

    采用-结构耦合分析方法对水化引起空心薄壁温度效应进行分析,计算中考虑了混凝土弹性模量龄期变化

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  • The result showed: resistivity curve and heat of hydration curve variation tendencies were approximate and unanimous, can be regarded as a kind of new method to study hydration.

    试验结果表明电阻率曲线水化曲线变化趋势近似一致作为研究水化的方法

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  • But, concrete placement temperature, surrounding temperature and the heat of hydration of cement, they take a more affection on lining thermal stress.

    混凝土浇筑温度环境温度以及水泥水化温度应力影响十分显著。

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  • But, concrete placement temperature, surrounding temperature and the heat of hydration of cement, they take a more affection on lining thermal stress.

    混凝土浇筑温度环境温度以及水泥水化温度应力影响十分显著。

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