With the continuous development of Pan'an's urban construction, high-rise buildings are emerging constantly. Large-volume pouring projects and urban road construction are increasing day by day. The components of large-span and large-volume concrete are also widely used. In order to ensure concrete quality and reduce energy consumption, Reduce the construction area, reduce noise, beautify the environment, meet the construction needs, urban construction in our county also started last year, respectively, from Dongyang, Pujiang, Yiwu and other places to buy concrete pump construction materials to the construction site. In June this year, the county also set up a pumping concrete mixing plant and started trial operation. Some of the construction sites have been using such commodities to pump concrete. However, the current market spot checks found that the main existence of some pumping concrete strength does not meet the quality standards, construction methods are not correct, maintenance is not in place and other issues, resulting in structural surface often dry shrinkage and temperature cracks and so on. Therefore, how to standardize my county commodity pumping concrete market is imminent, I suggest from the following aspects to be strictly controlled:
First, the strict requirements of the construction site using a commercial concrete production qualification certificates and business licenses and other goods produced by enterprises pumping concrete. Whether the quality of pumped concrete meets the requirements of the "Code for Construction and Acceptance of Reinforced Concrete Engineering" (GBJ204-83) is a prerequisite for guaranteeing the quality and safety of building structures. Therefore, it is necessary to ban the production of unlicensed and unqualified production enterprises in time and clean the market of concrete pumping concrete , To ensure the quality of pumping concrete production.
Second, the strict requirements of the project department to prepare a practical pumping concrete construction program. Pumped concrete before the formal pouring, the project department should be prepared in advance practical pumping concrete construction project, clear concrete pumping, pouring, vibrating, conservation, test block retention, demolition and construction joints left the location and processing, concrete Cooling and insulation and other construction quality assurance measures reported to the company after the approval of technical and quality security, submitted to the construction, supervision, before construction can be carried out. For the mass concrete construction in summer and the concrete quality assurance measures before concrete mixing, transportation and unloading during summer construction, the demand side can request written cooling (summer) and insulation measures in order to supervise and inspect concrete entering the site. Strengthen the supervision and management to ensure that the construction program in line with the state "concrete pump construction Technical Regulations" (JGJ / T10-1995)
Third, strictly control the pouring site pumping concrete construction management and on-site operation of quality control. Pumping construction is different from ordinary concrete construction of the law and characteristics of the construction quality of a direct impact on the safety of concrete structures, it should take targeted construction and organization measures, delivery and unloading at the scene to be verified to confirm strict construction in the construction management And on-site operation quality control to ensure the construction quality of pumping concrete structures.
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