A Study On The Utilization Of Waste Foundry Sand And Tailing Sand As Fine Aggregate For The Preparation Of Cementing Materialt

In recent years, foundry industry has been rapid development in our country, but also brought a lot of environmental pollution problems. Among them. Due to the foundry waste sand, tail sand recycling, municipal solid waste has become a stubborn, a heap of random phenomenon is widespread, the consequences are take up a lot of land, cause dust pollution, destruction of ecological environment, after the erosion by rain and even threaten the safety of groundwater environmental safety a major killerAccording to the geographical characteristics of the ZhangQiuShi in shandong province, this study analyzes the common local two foundry waste sand and tail ore mineral composition, fineness modulus of careful analysis determination and other physical and chemical properties, experimental research and explore the foundry waste sand and tail ore as part of the fine aggregate used in cement mortar and the feasibility of the concrete. Research aims at providing a foundry waste sand, tail ore effective recycling ideas and provide a new research direction.Specific research contents include:(1) the foundry waste sand, the tail of the ore mineral composition analysis determination. In order to avoid in the process of used sand in foundry use again cause secondary pollution to environment or damage to the user. First of all, the two kinds of foundry waste sand leach liquor of toxicity monitoring, to ensure that it does not belong to the hazardous waste; Second, in order to ensure the foundry waste sand, tail sand stability in use process, the ignition loss of three kinds of experimental materials and basic elements are analyzed in full. Measured its main composition is sio2, stable performance is suitable for the fine aggregate used as cement solidified material.(2) the foundry waste sand, tail sand fineness modulus determination. Used as fine aggregate, sand fineness is one of the important indicators. Fineness modulus and grain fineness of reasonable distribution directly affect the liquidity of cement gel, workability and flexural and compressive strength. This study measured the foundry waste sand, tail sand fineness modulus and the distribution of the particles, and the mechanism of sand sand, standard comparison, analysis the advantages and disadvantages of the experimental materials.(3) the foundry waste sand, the tail sand cement mortar experiments. By cement mortar experiments, the same situation in other conditions, the mechanism of three kinds of samples, sand replacing parts of the standard according to the different proportion of sand, cement mortar experiment was carried out respectively. It is concluded that the fluidity of cement paste and a variety of experimental test block of three days flexural, compressive strength, flexural and compressive strength for seven days. The experimental results and mechanism of sand under the same experimental conditions of the experimental results were compared. Analysis of change law, comparative experiment results.(4) concrete slump, strength experimental study. The two foundry waste sand, tail sand concrete mixture performance experiments, respectively. Measure of the three kinds of experimental materials in the experiment of concrete slump, m secrete water and color appearance. To further verify the experimental results of cement mortar experiments and result analysis.Finally, through the analysis of experimental results, the horizontal and vertical comparison of experimental data, it is concluded that foundry waste sand, tail sand as fine aggregate on the properties of cement concrete products. Explore the three kinds of solid waste in as fine aggregate in the application of building materials industry. Experiments prove that the above three kinds of solid waste to add will reduce the strength of the cement mortar and concrete, fluidity and slump, secrete water speed, reduce the water retention of concrete material. At the same time, adding pulverized coal foundry waste sand separating out the outer layer of cement products are pulverized coal with poor appearance. Of experimental data analysis results show that the tail sand as fine aggregate is more suitable for use in the building materials industry.