The deterioration is accelerated because the strength grade of concrete is too low, depth of cover too thin, and drain off water unsuitable.
调查表明，原设计混凝土标号过低，保护层过薄，桥面排水不当，加速了劣化过程。
In the test, the strength grade of concrete is C20 and C60, and the cementitious system contains 10%, 20%, 30% and 40% of fly ash in accord with weight.
实验中应用的混凝土的强度等级分别为C20和C60，其中粉煤灰的掺量(胶凝材料的质量分数)分别为未掺、10%、20%、30%、40%。
Based on design criterion and construction practice, the paper presented the method to treat beam - column node concrete with different strength grade in course of design and construction.
在设计规范与工程实践的基础上，着重论述了梁柱节点不同混凝土强度等级在设计和施工中的处理方法。
At the end of the paper, a stress strain response model of different concrete grade has been built only using the compressive strength, and this model coincides well with the experiment results.
文末，仅通过混凝土立方体抗压强度，建立了不同强度等级混凝土的应力-应变曲线上升段本构关系，该模型结果与试验结果吻合很好。
The mechanical properties of limestone chip concrete with ordinary strength grade were studied, and the relationships between the mechanical properties were analyzed.
本文研究了常用强度等级的石灰石石屑代砂混凝土的力学性能，并对各项力学性能指标之间的相关关系进行了统计分析。
It shows the axial tension initial cracking strength of concrete increases with the increasing of steel fiber volume ratio and enhancing of concrete strength grade separately.
结果表明：混凝土轴拉初裂强度分别随钢纤维体积率的增大和混凝土强度等级的提高而增大。
The whole stress-strain curves of structural lightweight aggregate concrete (LWAC) with strength grade from LC30 to LC55 were obtained experimentally.
测定了采用高强轻骨料配制的强度等级LC30～LC55的结构轻骨料混凝土（LWAC）的应力-应变全曲线。
Some technical methods are used to make construction convenient when different strength grade concrete is used in the joint of beam and column in high building.
介绍了高层建筑中 ，在钢筋混凝土框架结构的梁柱节点处 ，混凝土强度等级不同 ，为了方便施工 ，所采取的技术措施。
The results show that under the same supporting load, the cost of the steel reinforced and tubular concretes decreases as their concrete strength grade increases.
分析结果表明：在支撑相同荷载的前提下，混凝土强度越高，造价越低。
Cement concrete pavement BECause of its high strength, good stability, as well as the advantages of long life, high-grade highway construction in the wider application.
水泥混凝土路面因其具有强度高、稳定性好以及使用寿命长等优点，所以在高等级公路建设中应用较广泛。
In this study, quality light aggregate concrete with 1800 grade of apparent density and CL50 grade of compressive strength was obtained, using mixed type aggregate.
本项研究用混合型集料配制出了表观密度等级为1800，抗压强度等级为CL50的优质轻混凝土。
On the condition that same axial compression ratio, bearing capacity and stiffness of RC frame columns increases with concrete strength grade after the construction member achieve yield strength.
相同轴压比条件下，构件达到屈服荷载后，构件的承载力和刚度都随混凝土强度等级的增大而提高。
Now the present code has got considerable changes in concrete grade of strength. In order to understand and put the present code into practice correctly, this paper has stated …
为了正确理解和执行现行规范，本文采用对比的方式叙述了这种变化，并导出了对工程非常有用的混凝土强度等级与原规范混凝土标号之间的换算关系。
At the same time, the concrete has high compressive strength, good durability, strength grade of a wide range of characteristics.
同时混凝土还具有抗压强度高，耐久性好，强度等级范围宽等特点。
Cement concrete pavement because of its high strength, good stability, as well as the advantages of long life, high-grade highway construction in the wider application.
广告载入中…广告载入中…【摘要】水泥混凝土路面因其具有强度高、稳定性好以及使用寿命长等优点，所以在高等级公路建设中应用较广泛。
Thermal curing process in the preparation of aerated concrete under the age 5days, its strength and density grade reached the standard request to a B08 level of autoclaved aerated concrete.
在热养护工艺下制备的加气混凝土5d龄期强度和密度等级均达到了B08级蒸压加气混凝土的要求。
Thermal curing process in the preparation of aerated concrete under the age 5days, its strength and density grade reached the standard request to a B08 level of autoclaved aerated concrete.
在热养护工艺下制备的加气混凝土5d龄期强度和密度等级均达到了B08级蒸压加气混凝土的要求。
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