共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
通过将羟丙基甲基纤维素醚、高效减水剂、消泡剂、引气剂、防水剂及膨胀剂等外加剂复掺进行试验,探索不同外加剂在砂浆中的合理掺量,使制备的砂浆具有较好的保水增稠性能,满足现场施工要求:28 d抗压强度在24 MPa以上,28 d抗渗压力大于1.6MPa,符合JC/T984-2005<聚合物水泥防水砂浆>标准规定. 相似文献
3.
4.
5.
6.
7.
8.
主要阐述太钢冶炼废水处理工程中结构复杂,防渗技术要求高的混凝土水工结构,采用有机硅防水砂浆作为防水层的一项重要措施,以保证混凝土水澉不渗漏及工艺,设计和使用功能均达到要求,根据工程特点,分别从有机硅防水砂浆的特点,配合比配置,施工技术和质量控制等方面进行了介绍。 相似文献
9.
阐述了聚合物改性水泥砂浆的原理,介绍了聚合物改性高强水泥修补砂浆的试验研究成果并展望了聚合物改性水泥修补砂浆的应用前景。 相似文献
10.
结合PSC安赛防水砂浆的配制特点,介绍了防水砂浆的施工工艺原理、适用范围和工艺流程,阐述了施工质量控制要点,经过工程实际应用,证明了利用PSC安赛防水砂浆防水的优点。 相似文献
11.
Carlo Pellegrino Francesca da Porto Claudio Modena 《Construction and Building Materials》2009,23(10):3129-3137
The aim of the paper is to investigate the compatibility and the efficiency of the rehabilitation intervention on reinforced concrete columns with polymer-modified cementicious mortar. This paper presents the results of experimental tests on axial behaviour of reinforced concrete columns, with square cross-section, repaired by polymer-modified cementicious mortar. Tests were repeated varying repair thickness, which included or did not include the steel reinforcement on one face of the square column. Despite this type of intervention is quite common in practice, the effect of repair thickness on the intervention efficiency, in relation to the existing steel reinforcement configuration, had not been previously studied in detail for axially loaded elements.Results were discussed and compared with those from control columns, which were tested in non-damaged, non-repaired conditions. The main findings of this work can be summarized as follows. The repair cannot restore the load-bearing capacity of non-damaged control columns, although they give acceptable results. Repairs that include the longitudinal reinforcement show good properties, with stable behaviour, sharing of loads, and plasticization of the material before failure, whereas thin repairs that do not include the reinforcement do not have adequate performance due to premature debonding. Non-linear numerical models also confirmed the different behaviour of the two types of repair. 相似文献
12.
13.
14.
DongCheon Park JaeCheol Ahn SangGyun Oh HwaCheol Song Takafumi Noguchi 《Construction and Building Materials》2009,23(1):434-447
Deterioration mechanism due to drying and shrinkage of patch-repaired regions in reinforced concrete structures is analytically investigated. The moisture diffusion coefficient of the repair materials was determined by varying the drying temperature and the polymer-to-cement ratios of the polymer-modified cement mortar (PCM) in the experiment. It is found that the diffusivity of PCM increases in proportion to the polymer-to-cement ratio up to 10%. The constraint stresses due to drying at the repaired region were estimated by the couple-linear finite element analysis with respect to volumetric change, moisture diffusivity, water content and mechanical properties of the repair material. Based on the distributions of relative water contents and stresses, the effects of these parameters are discussed. The stress generated by drying and shrinkage was affected by substrate concrete, environmental condition and the properties of PCM. Of the repaired PCM tested, it is demonstrated that the CPM with 10% polymer-to-cement ratio generates the highest constraint stress. 相似文献
15.
16.
介绍新型墙体聚合物改性水泥基防水抹灰砂浆—固不漏浓缩剂(粉)材料的开发,以及现场搅拌固不漏干粉防水砂浆的施工、应用和效果。 相似文献
17.
聚合物水泥防水砂浆在低温环境中由于水化反应不完全,产品早期抗压强度低、易粉化、抗渗性能差、防水效果不好使其应用受到限制.采用硅酸盐水泥、硫铝酸盐水泥和无水石膏三元复合胶凝体系制备聚合水泥防水砂浆,对防水砂浆的性能进行研究和应用发现,在聚合物水泥防水砂浆中,硅酸盐水泥的掺量在45%~50%、硫铝酸盐水泥的掺量在10%~15%、无水石膏的掺量在3%~5%时有很好的胶凝匹配性,防水砂浆具有高强度、低收缩率和低吸水率、优异耐水性和良好的耐低温性能. 相似文献
18.
新环保型丙烯酸防水涂料施工技术 总被引:1,自引:0,他引:1
以铁十二局承建的某高速公路防水工程施工为例,详细介绍了丙烯酸防水涂料材料性能,阐述了其施工工艺及防水经验,经施工实践,取得了良好的社会效益。 相似文献
19.
根据现阶段外墙外保温技术发展的需求,哈尔滨工业大学与市墙改办共同研制出性能优异的干粉型聚合物改性砂浆(Polymer-modified mortar,即PMM)。采用正交试验设计与层次分析方法(Analytic Hierarchy Process,即AHP)相结合设计试验及处理试验数据,得到了理想配比。 相似文献
20.
以吸水量比作为评价水泥基防水砂浆抗渗透性能的主要技术指标,通过正交试验来确定了W-H复合高效砂浆防水剂各组分的最佳配方,并对其主要技术性能和应用前景进行了分析和介绍。 相似文献