Concrete is a building material that is currently used by many construction parties. If cracks appear in the concrete during construction, when the cracks are too large, it is very easy to cause leakage in the concrete structure, resulting in reduced durability. Whether the concrete is stable or not is directly related to the safety of the building. Therefore, it is very important to reduce the cracking of concrete, and it is also a problem that many construction parties are very concerned about. In practice, we often use high-efficiency water reducers and mineral admixtures. These two substances can better meet the needs of work, but the problem of concrete cracks cannot be well improved. Therefore, we now use more expansion agents, which can greatly improve the crack resistance of concrete and prevent cracks. Compared with shrinkage reducers and synthetic fibers, mixing expansion agents into concrete is the most cost-effective solution, especially using expansion agents that were originally industrial waste as raw materials, which greatly improves resource utilization. Vanadium iron slag is a solid waste produced by smelting. It can compensate for shrinkage, maintain the stability of concrete, and has hydration activity. Therefore, vanadium iron slag, with its excellent performance, may replace the commonly used calcium sulfoaluminate expansion agent and become a new favorite in the concrete industry. Its advantages are as follows:
First, vanadium iron slag, as an admixture of cement-based materials, has an obvious shrinkage compensation effect. When used in concrete panels, it can effectively inhibit shrinkage, reduce concrete cracks and improve durability. Taking into account various factors such as compressive strength, it can be proved through careful scientific experiments that when the proportion of vanadium iron slag is 15%~20%, the cement-based material has good compression resistance and crack resistance.
Secondly, the compressive and tensile strength ratios of single fly ash, composite vanadium iron slag and fly ash concrete are higher than those of pure cement concrete, especially composite vanadium iron slag and fly ash concrete. Actual construction has proved that when 20% vanadium iron slag and 10% fly ash are used to replace cement in concrete, the application effect is good in two panel reinforcement projects.
The use of vanadium iron slag to partially replace cement plays a great role in improving the performance of cement-based materials and utilizing industrial waste. It can not only prevent concrete cracks, but also achieve the purpose of saving resources and protecting the environment. Hetaifeng concrete pump truck has core technical advantages and excellent cost-effectiveness. It always adheres to the service concept of "quality carries heavy trust, service improves the market" and strives to build a service-oriented intelligent manufacturing enterprise.