How to Improve the Appearance Quality of Concrete

• Posted by Mavis Chai October 24, 2022 Filed in Arts & Culture #  #concrete plant  103 views
  click to rate

  With the rapid development of engineering construction, the quality of engineering is subject to widespread social concern. How to improve the appearance quality of concrete as much as possible under the premise of ensuring the internal quality of engineering buildings is the key element to enhance the image of engineering buildings. 

  1. Pay attention to the use and management of templates

  Should be selected to ensure that the surface of the flat, smooth cold rolled steel plate template, plate surface requirements of smooth, smooth, no trachoma, no rust spot, no scars. The inner surface of the plate splicing shall be polished smooth and smooth, without obvious concave and convex traces. Before the template is used, the sundries and rust spots on the surface should be removed. The process of first coating and then wiping can be used to coat the surface of the plate with release agent to form an oil film. If the time is too long, the second treatment should be carried out. When docking pier and column templates, weld the template surface together and polish it smoothly. When assembling two templates, insert positioning pins and tighten the bolts twice to avoid the occurrence of wrong platform. The formwork should be installed firmly and stably. The formwork of the pier column should be fixed by four steel ropes with tensioning devices.

  2. Strict standard operation of concrete batching and mixing

  In the selection of materials, we should choose well-graded sand and stone, cement inventory should be more than a week, try to choose the same origin, the same batch of raw materials, different batches of commercial concrete sometimes color difference is larger, try to choose self-mixed concrete. In the ingredients, according to experience and calculation to determine the proportion, under the premise of ensuring the construction technology, as far as possible to choose a smaller slump, and pouring test, ensure the concrete surface uniform and consistent, natural color and lustre. When mixing, it is necessary to check the measuring device in the mixing building, and strictly control the water content of sand and stone, especially on rainy days. The mixing time of concrete should be controlled to ensure the uniformity of concrete mix. During transportation, we should pay attention to the use of concrete transport vehicles to transport concrete to the site. Well, first stir, then unload and pour.

  3. Specification of concrete pouring and vibrating operation

  Adhere to pouring and tamping, to overcome the heavy vibration light pouring shop habit. Good implementation of layered piecewise pouring, in the concrete initial setting time to complete the concrete layer, layer virtual shop thickness to 40cm is appropriate, the template has a negative Angle inverted slope, concrete shop to the inside of the inverted slope below 5cm, fully vibrating, to be the bubble vibration out, and then pour the inverted slope of concrete. Each layer of vibration always keep pouring and tamping before and after a certain distance, generally about 1m. Concrete pouring shop as far as possible to do around slightly higher, slightly lower middle; Can't use vibrating rod to drive amortized concrete, in order to prevent mortar loss, resulting in poor uniformity of concrete. Concrete pouring shop should be reasonable paragraphwise stratification, vibrating rod should be quickly inserted and slowly drawn, do not appear leakage vibration, undervibration, over-vibration, early vibration, fast vibration, delay vibration and so on affect the appearance quality of concrete operation. Concrete vibration, should be around the middle, in order to the air bubble as far as possible to avoid the air bubble gathered in the template.

  Pay attention to the above items in the process of concrete production and use, can improve the appearance quality of concrete, so as to achieve the effect of both internal and external quality.