耐久性能

• The concrete ’ s anti - frozen can reflect concrete ’ s synthesis durability in the certain degree . this paper changed the former research mentality which enhanced concrete anti - frozen to use an extra material , aimed at the inner mongolian characteristic , utilized compound cement substituted ordinary portland cement , mixed the dula - fiber , the grade 2 inner mongolian pulverized coal ash , the extra material that was highly effective reduces the quantity of water outside the concrete to improve the concrete ’ s main performance , especially the concrete ’ s anti - frozen
  混凝土抗冻性在一定程度上能够反映混凝土的综合耐久性能,本论文改变以往提高混凝土抗冻性只采用一种外掺料的单一研究思路,针对内蒙古地区特点,运用复合水泥取代普通硅酸盐水泥,在混凝土中掺入杜拉纤维、内蒙2级粉煤灰、荼系高效减水剂三种外掺料,来提高混凝土的主要性能,尤其是混凝土的抗冻性。
• The concrete used in testing bridge is monitored and some performance at definite age including compressive strength , splitting fensile strength , frost resistance , scaling frost resistance , chloride ion diffusion coefficient ( dcl - ) , resistance of carbonization and pore structure by mercury porosimetry are tested . these performances are compared with that of concrete which designed by traditional method . the results show that mechanical properties of concrete designed by high durability concrete proportion and traditional method meet require ment at any age , however , frost resistance , scaling frost resistance , chloride ion diffusion coefficient ( dcl - ) , resistance of carbonization and pore structure of the former are better than the latter , so high durability concrete is economic benefit
  对试验桥用混凝土的质量进行监控,并成型试件测量所需龄期内的抗压强度、劈裂强度与抗冻融、抗盐冻、氯离子扩散系数( dcl - ) 、抗碳化等耐久性能指标及孔结构,并与传统混凝土进行对比研究,结果表明:高耐久性混凝土及按传统配合比设计的混凝土的力学性能均能满足相应龄期的要求,但前者的抗冻融性能、抗盐冻性能、抗碳化性能、 dcl -和孔结构明显优于后者,并具有明显的社会经济效益。
• 3 . the results of research on durability of hbc concrete including resistance of freeze - thaw , permeability , carbonation , corrosion as well as shrinkage and sub - microstructure structure exhibit hbc concrete has good properties of freeze - thaw resistance , permeability resistance , carbonation resistance , corrosion resistance and less shrinkage compared with opc concrete
  通过对高贝利特水泥高性能混凝土的一系列耐久性能包括抗冻、抗渗、抗碳化、抗侵蚀、干缩以及其各龄期的亚微结构等的研究，得出：高贝利特水泥高性能混凝土具有良好的抗冻、抗渗、抗碳化及抗侵蚀性能并且干缩较小。
• Depending on the tenth five - year plan by china , the workability , physical mechanics property , durabilities of concrete were systematic studied . combining with micro - structure test and applying the laws between the composition , structure , qualitiy of materials and considering the production cost of engineering , the principle of the design and technique route of mamufacturing low - cost high performance concrete ( lc - hpc ) was put forward . the important theoretical and technological support for the design , application of lc - hpc is provided
  本文以“十五攻关”课题为依托，对混凝土的工作性、物理力学性能、耐久性能进行了系统实验研究，通过与微观结构测试相结合，应用材料组成、结构与性能的规律，考虑生产成本并结合工程应用，提出低成本高性能混凝土( lc - hpc )配制的设计原则与技术路线，为lc - hpc的设计、应用提供了重要的理论与技术支撑。
• Two - addition technique of flying ash and silica fume can meliorate durability of concrete ; air - entraining admixture possesses anti - freezing , descending ice point , and improving workability , and thereof it should be used in concrete . but controlling its dosage is very important to avoid strength loss
  发现粉煤灰和硅灰的双掺技术能够显著改善混凝土的耐久性能，引气剂具备防冻抗冻、抗渗及提高负温混凝土工作性的优点，在负温混凝土中应该加大使用范围，但必须控制其掺量，确保强度损失较小。
• Under the direction of such theories , the influence of the composition of the concrete to the workability , mechanical property and durability of hplc is analyzed systematically ; the key technology of the preparation of hplc was grasped . the theory of strength improvement of subsidiary bonder is detected , special additive - fdl for hplc is made , lc40 - lc60 hplc with the slump over 18cm , the slump flow over 50cm , segregation degree below 5 % , small drying shrinkage , high tension strength and long durability is prepared . the concept and experimental method of the segregation degree of the mixture is put out and the analytical system of high performance hplc is built
  以设计理念和设计理论为指导，系统研究了轻集料、辅助胶凝材料等组分及其配比参数对轻集料混凝土工作性能、力学性能和耐久性能的影响规律，探明了辅助胶凝材料对于轻集料混凝土的增强机理，研制出能够有效控制轻集料混凝土拌和物分层离析度和降低坍落度经时损失的专用外加剂fdl ，掌握了制备高性能轻集料混凝土的关键技术，制备出坍落度大于18cm 、扩展度大于50cm 、分层度小于5 、低干缩、高韧性、高耐久的lc40 lc60高性能轻集料混凝土。
• Then , using statistical method , performance indexes are compared , and the prior layer setting is obtained . through elaborate indoor tests , the drainage performance , mechanics performance and durability of asphalt treated permeable material are researched . by statistical analyses of vast test data , the balance range of air voids is obtained , via performance tests in different saturation conditions , the durability of the material is gained
  对沥青稳定碎石排水层混合料的材料组成进行了精心的室内试验设计，依据室内试验结果，对沥青稳定碎石排水层混合料的透水性能、力学性能和耐久性能进行了各种因素的影响分析，经数理统计分析获得了有关性能指标之间的经验关系，找到了透水性能和力学性能之间的平衡点。
• For concrete structure in the practical engineering , the non - mechanics damages , such as alkali - aggregate reaction , sulfate attack , carbonization , steel rust , freeze and thaw , and so on , are unavoidable due to the exist of erosive media . the deterioration form of mono or multi - factor influences on the concrete property of construction and durability greatly , and shortens the service life of the concrete to a large extent . permeability of concrete is the most important factor for these non - mechanics damages , so the permeability test of concrete is the normal and required item to study the durability of concrete
  实际工程中的混凝土结构，因侵蚀性介质的存在而使非力学破坏行为无处不在，这些非力学破坏行为包括碱集料反应、硫酸盐侵蚀、碳化、钢筋锈蚀、冻融等，单一的破坏形式或多形式的复合破坏作用对混凝土结构性能及耐久性能均有着较为严重的影响，在很大程度上缩短了建筑物的服役年限，而这些非力学破坏在很大程度上取决于其渗透性，所以测试混凝土渗透性能是研究判断混凝土耐久性的常规必测项目。
• On the basis of the characteristic of the industry waste slag , which is high added to the hsfab , different kinds of catalyzing methods are adopted to make the waste residue more active . the additive f , developed by the author can obviously improve the mechanics characteristic and durability of hsfab , especially the restraining of the drying shrinkage . based on the study of technics parameters and the problems in the manufacture , hf - 1100 series full - automatic hydraulic pressure wall brick presses is chosed to solve the problems , such as low molding pressure , low efficiency and the certified product ration
  在hsfab的研究方面，通过两种体系hsfab (即“水泥?钢渣?粉煤灰?炉渣”和“石灰?钢渣?粉煤灰?炉渣”体系)的配方优化设计，使之具有良好的社会、经济和环境效益；在高掺量工业废渣的前提下，根据各种原料的特性，对其采用不同的活化技术，使其具有较高的活性；自研的外加剂f ，对hsfab制品的物理力学性能和耐久性能均有明显的改善作用，尤其是对制品的干燥收缩性能有显著的抑制作用；通过对工艺参数的研究，结合实际生产普遍存在的问题，选取了hf - 1100系列全自动液压墙体砖压机，有效地解决了传统制砖过程中常见的成型压力低、生产效率低、产品合格率低(即“三低”现象)等问题。