This article analyse the principle of the comtract of the cement stabilized soil , the endanger to road surface and how to prevent 摘要分析了路面水泥稳定基层干缩裂缝产生的机理,干缩裂缝对路面的危害和相应的预防措施。
The influence of shrinkage - reducing agent , polypropylene fiber and expansion agent on strength and dry shrinkage of the concrete were systematically tested 系统测试了减缩剂、聚丙烯纤维和膨胀剂对砌块材料强度和干缩性能的影响规律。
Wood features : medium shiny wood ; no special odor , high intensity , heavy timber , durability strong , stable performance and ruggedness structure 木材特性:具有较强光泽,纹理直通,结构细腻均匀,强度高,干缩率中等,很具耐腐性且抗白蚁。
At the primeval moulded time , cracks are mainly caused by temperature shrinkage and autogenous shrinkage , after that , it is mostly caused by dry shrinkage 混凝土浇筑初期开裂主要是温度变形和自收缩引起,后期开裂则主要是因干缩所致。
Abstract : the various changes of dry - shrink and temperature are f airly sensitive to the shape of a cast - in - site concrete roof and leveling blanket 文摘:屋盖与找平层对于混凝土干缩和温度的变化比较敏感,其原因是由于设计安全储备小,强度不足及施工质量差。
It can adjust the retardation time and water reducing ratio properly according to the customer s demand , and it is applied to various waterproofing concrete , especially the large application of waterproofing concrete in winter 混凝土凝结时间稍有延长可减少干燥天气时新浇混凝土的干缩裂缝,掺量必须严格控制和精确计量。
In the experiment the author study on increasing the durability ( including strength , dry shrinkage , abrasion resistance and freeze resistance ) of roller compacted concrete ( rcc ) by mixing fly ash 摘要试验采用在碾压混凝土中掺入粉煤灰(其掺量占胶凝材料总量的10 % ~ 45 % )的方法来提高碾压混凝土耐久性(包括强度、干缩、耐磨性和抗冻性) 。
The reflective cracking and the surface cracking in the semi - rigid pavement are common under the sudden temperature changed and continuous low temperature for its sharp contraction characters produced by the change of temperature and humidity 由于半刚性材料的温缩性和干缩性,路表温度的骤然升降和持续低温,使得半刚性路面中广泛存在反射裂缝和表面裂缝。
Based on these theoretical studies , the temperature stress and shrinkage stress of plain concrete slab and reinforced concrete slab are calculated using finite element analysis software adina , and the differences between them are also made 在此理论研究的基础上,通过有限元分析软件adina来计算素混凝土平板构件和配筋混凝土楼板的温度应力和干缩应力,比较其抗裂性能的区别。
Secondly , the workability , the ( cube ) compressive strength , the cylinder compressive strength , the drying shrinkage and the modulus of elasticity of the recycled coarse aggregate concrete , were studied in systemly in this paper 其次,系统的研究了再生粗骨料混凝土工作性、 (立方体)抗压强度、棱柱体抗压强度、干缩变形、弹性模量,并详细分析影响再生粗骨料混凝土工作性、强度、干缩变形的因素。