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- drying shrinkage stress of concrete 混凝土干缩应力
- Research on drying shrinkage stresses of concrete slabs on rock-fill dams 堆石坝混凝土面板干缩应力的研究
- drying shrinkage stress 干缩应力
- Shrinkage stress was found to increase linearly with cure temperature. 我们发现收缩应力随固化温度直线增加。
- The drying shrinkage and self-shrinkage of concretes with different water to binder ratios were studied. 实验研究了不同水胶比的混凝土干缩性能及自收缩性能。
- The influence of shear-pattern steel fiber on plastic cracking, drying shrinkage and mechanical properties of concrete is studied by experiments. 摘要通过试验研究剪切型钢纤维对混凝土的塑性开裂、干燥收缩及混凝土力学性能的影响。
- It is generally considered that drying shrinkage occurs because of the capillary tension as a result of water lost from capillary. 混凝土的干燥收缩机理通常用毛细孔失水,形成弯月面,在毛细孔张力的作用下产生收缩。
- The article points out that shrinkage stress is a very important substance in studing of fabric shrinkage. 本文提出了织物缩水时收缩应力这一问题研究的意义。
- The study of the fracture suggests that the addtion of MMT disperses the shrinkage stress effectively. 对断口形貌的分析得出,MMT的加入有效分散了收缩应力。
- The corrosion resistance and freeze/thaw resistance of alkali-activated cement are much better, and the drying shrinkage rate is much greater than ordinary portland cement. 碱?磷渣?粉煤灰胶凝材料的耐蚀性和抗冻性能均显著优于硅酸盐水泥,其干缩比硅酸盐水泥的大。
- The results indicated that high C3S cement had higher strength and less drying shrinkage and can largely utilize fly ash (up to 40% of fly ash may be added). 结果表明,高C3S水泥具有较高的强度和较小的干缩,可大量利用粉煤灰(掺量可达40%25)。
- Applying certain pressure in this procedure, after lacquers gelatinized, can prevent the deformation and shrinkage stress of PMMA substrate. 通过在凝胶化后施加一定的压力能够减小形变和收缩应力。
- The calculation formula on joint open has been set up with the consideration of hogging distortion caused by temperature, expansion deformation and drying shrinkage. 建立了考虑温度翘曲变形、伸缩变形和干缩变形等影响的接缝张开量的计算公式。
- The example shows that quite reasonable calculation results of humidity field and shrinkage stress of interface can be obtained by the model. 算例结果表明,应用该模型可以获得较为准确合理的接触面湿度场及干缩应力计算结果。
- Some durability tests such as drying shrinkage test, sulphate attack test, briny erode test, freezingand thawing recycles test and reinforcing steel rust test are taken on. 为此本文亦进行了掺加JYQ796型高效无机防水防潮剂的水泥砂浆或混凝土的一系列耐久性实验,如干缩实验,抗硫酸盐侵蚀、抗海水侵蚀、抗冻融循环、抗钢筋锈蚀等。
- The main reason of shrinkage stress during curing period is the change from distance between monomer moleculers to covalent distance . 树脂固化时收缩应力的主要原因是单体之间的分子间距离缩短变为共价距离。
- When AEA was mixed into mortar, dry shrinkage of mortar reduced and infiltration resistance has improved. 砂浆中加入AEA膨胀剂后,砂浆的干缩下降,抗渗性也有一定提高;
- The effects of polypropylene fiber on the plastic shrinkage stress and plastic shrinkage ratio of the mortars were investigated by use of a self-designed measuring device. 采用自行研制的水泥砂浆塑性收缩应力测试装置和非接触式测长装置,分别研究了低掺量的聚丙烯纤维对水泥砂浆塑性收缩应力和塑性收缩率的影响。
- Engineering practice shows that the occurrence of slab cracks especially the penetration cracks are often caused by temperature stress and shrinkage stress. 工程实践经验表明,面板裂缝尤其是贯穿性裂缝的产生主要是由于温度应力和干缩应力引起的;
- The types of those cracks are summarized as three kinds: plastic shrinkage cracking, dry shrinkage cracking and hydration heat cracking. 将引起混凝土裂缝的类型归纳为塑性收缩开裂,干燥收缩开裂,水化热开裂三种,并对其表象及成因进行了阐述。