Nowadays , air entraining , mineral admixture and additive have been main measure to improve the concrete frost resistance and impermeability 当前,引气和掺加矿物掺合料及外加剂已成为提高混凝土抗冻性和抗渗性的主要措施。
The performance of hpch is 1 - 2 times more than the traditional materials on the resistant abilities of wearing , chemical corrosion and freezing 耐磨性、耐化学侵蚀性能、抗冻性均高性能彩色印模饰面混凝土技术的研究较传统材料提高l 2倍。
5 plasticity retention : it has good plasticity retention and it can reduce the slump loss of the concrete that keep it no more than 2cm in 2 hours . applied to the pump concrete 使用本品能提高混凝土强度和抗冻性，改善混凝土的和易性，降低泌水率，提高混凝土的耐水性。
The thesis analyzes the main reasons of frost damages by freeze - thaw test . in the preface , the thesis introduces concrete structures development and problem in china and other countries 本论文通过混凝土的抗冻性试验，来分析影响混凝土抗冻性的主要因素，提出提高混凝土抗冻性的措施。
In a word , based on plenty of experiment , the intensity , volume stability and freezing - resistance of this new kind of high performanced concrete have been completely analyzed 总之在大量的实验基础上，对不同掺量的超细矿渣粉高性能混凝土的强度、体积稳定性、抗冻性等耐久性进行了全面的分析。
It is verified that the performance of concrete in frost resistance has been greatly improved through a series of tests on concrete ' s frost resistance and analyses of contrasted results in and out of door 通过对混凝土抗冻性的跟踪检测和室内外对比试验分析，发现与普通混凝土路面相比，抗冻性明显提高。
The conclusion shows the method fits and the mineral admixture can reduce the pore porosity of concrete and improve the compactibility and freezing resistance of concrete 结论对于混凝土冬季施工更合适未用自然变低温养护的方法，掺入适量的掺合料能使混凝土孔隙率显著降低，使混凝土更加密实，提高混凝土的抗冻性。
In cold areas , concrete is always deteriorated by freezing and thawing cycle . the durability and the corrosion of concrete are directly affected by the water - saturated degree of concrete 寒冷地区冻融循环破坏往往是导致混凝土劣化的主要原因,而混凝土内部的水饱和程度又直接影响了混凝土本身的抗冻性和耐腐蚀性。
Comparing with the standard curing , curing under minus - temperature for 7 days does harm to concrete , which performance of resisting freezing - thawing cycles and chloride diffusivity decreased after the 28d standard curing 相对于标准养护,负温养护7d会对混凝土形成损伤,转标养28d后,混凝土的抗冻性和抗氯离子渗透性均有所下降。
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） 。
