混凝土原材料质量控制的研究

发布时间：2018-04-12 09:24

本文选题：混凝土质量 + 耐久性　；参考：《河北工业大学》2014年硕士论文

【摘要】：对于混凝土工程而言，原材料质量的控制是公路工程施工质量控制的基础和前提条件，原材料质量控制是保证混凝土质量的第一关。原材料是工程实体的组成部分，是影响公路工程质量的根本所在，对工程质量有着直接的关系，原材料质量的好坏是影响混凝土使用性能和使用寿命的关键因素。因此要求施工单位要加强对所用原材料的检验和检测，把好材料采购大关，对原材料进行测试鉴定，这就要求我们在原材料进场前和进场后都要不间断的进行抽样和检测，一旦发现不合格就要拒其进场、使用，严禁使用不合格材料，将影响工程质量的隐患扼杀在萌芽状态。本文针对河北地区混凝土生产过程中的集料的质量控制进行了调研，并对由原材料质量控制不当引起的原材料和混凝土性能变化规律的进行了研究、分析，，提出了相应对策。一般来说水泥混凝土是由水泥、矿物掺合料、外加剂、骨料等四大原材料组成。新拌混凝土的工作性能，硬化混凝土的强度、耐久性能很大程度上取决于原材料的质量。在日益高要求的建筑施工中，水泥混凝土质量要求也越来越高，需把握好原材料的质量。本文分别研究了水泥品种和细度、粉煤灰的成分和品质、外加剂的品种和掺量以及粗、细骨料对混凝土的质量影响，通过研究不同因素影响下混凝土的强度、碳化、渗透性和干湿循环作用等，对试验结果分别进行了分析和比较，并结合河北省地区的实际工程环境，给出了适合本地区工程需求的混凝土材料控制标准。
[Abstract]:For concrete engineering, raw material quality control is the foundation and precondition of highway construction quality control, and raw material quality control is the first step to guarantee concrete quality.Raw material is the component of engineering entity and the fundamental of influencing highway engineering quality. The quality of raw material is the key factor to affect the performance and service life of concrete.Therefore, the construction units are required to strengthen the inspection and testing of the raw materials used, to purchase good materials and to test and authenticate the raw materials. This requires us to conduct uninterrupted sampling and testing before and after the raw materials enter the market.Once it is found that it is not up to standard, it is forbidden to use unqualified materials and nip the hidden trouble affecting the quality of the project in its infancy.In this paper, the quality control of aggregate in concrete production in Hebei area is investigated, and the law of change of raw material and concrete performance caused by improper quality control of raw material is studied, and the corresponding countermeasures are put forward.Generally speaking, cement concrete is composed of cement, mineral admixture, admixture and aggregate.The performance of fresh concrete, the strength and durability of hardened concrete depend to a great extent on the quality of raw materials.In the increasingly demanding construction construction, the quality of cement concrete is also higher and higher, it is necessary to grasp the quality of raw materials.In this paper, the influence of cement variety and fineness, the composition and quality of fly ash, the variety and quantity of admixture and coarse and fine aggregate on the quality of concrete are studied respectively, and the strength and carbonization of concrete under different factors are studied.The test results are analyzed and compared respectively by permeability and dry-wet cycle. Combined with the actual engineering environment in Hebei Province, the control standard of concrete materials suitable for the engineering needs of this area is given.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU528

【参考文献】