Nowadays, people's living conditions are getting better and better, and rural construction has changed a lot. Especially in rural houses, almost all new houses have been built. Concrete is very important when building a house, but some farmers will have concrete cracking problems. What is the reason for this?
According to the multi-faceted analysis of Xiaobian, the following reasons are summarized.
1. Raw material factors. Raw materials such as sand and cement are required to produce concrete. Because of the environmental protection, the price of sand and cement is rising, and the procurement is difficult. Some unscrupulous businesses want to take advantage of the opportunity to earn profits, and sell the sand and cement to the farmers. Therefore, the quality of the concrete produced by using these inferior raw materials. It is not good. If the amount of sand and gravel exceeds the standard, it will have a certain impact on the crack on the concrete surface. If the cement dosage exceeds the maximum limit of the specification, cracks will also occur on the concrete surface.
2. Construction factors. There is also a certain requirement for the production of concrete. The concrete produced in rural areas is almost always a small concrete mixer. However, if the mixing time is short, the uniformity of the concrete will be affected. If the mixing time is too long, the water will evaporate. If the water-cement ratio exceeds the design amount, the water-cement ratio is too large, and the concrete shrinkage is increased, so that irregular cracks appear in the concrete.
In the concrete pouring, the construction personnel may have uneven vibration or vibration, over-vibration, etc., resulting in the phenomenon of concrete segregation and poor compactness, which will reduce the strength and compactness of the concrete, so cracks will appear on the concrete surface.
3. Concrete curing conditions. Maintenance is an important means to make concrete harden normally. On-site concrete pouring is often started after the concrete is demolded. The top surface of the hollow plate is exposed to the atmosphere. If the temperature is too high in summer, the evaporation of water will be accelerated, and the concrete surface will shrink and crack. In winter, the external temperature is too low, which is different from the temperature inside the concrete. The temperature difference between the inside and the outside is too large, and the concrete is prone to cracks.
Whether it is building a house or building a road, the quality of concrete cannot be ignored. Building a house in the countryside is for long-term residence. If the quality of the concrete is not good, it will affect the quality of the house. Farmers may have a lot of troubles to deal with when they live. Therefore, when building a house, everyone must pay attention to the quality of the concrete. The concrete mixer produced by our company has been improved by many years of technology, which can effectively improve the quality of concrete during the construction process. It has the characteristics of convenient operation, high efficiency and cost saving. Interested friends are welcome to leave a message!
