The process of commercial concrete is different from the concrete stirred on site, and the existence of transport distance and time must control the slump loss. Therefore, the following factors should be considered when designing the concrete mix ratio:
1. Determine the initial slump according to the transport distance and transport time: the initial slump is 18cm~20cm at close range (<10km) or 1h, and 20cm~22cm at long distance (>10km) or 2h.
2. Control the slump loss, that is, the slump before being controlled into the pump should be greater than 15cm. Because the slump is <15cm, the pumpability is poor. When the slump is >20 cm, the concrete remains in a large fluidity state for a long time after pouring, and its stability is likely to cause segregation and slow coagulation.
3. Control of initial setting time: initial setting time of beam-column column is 8 h~12h, mass concrete is 12h~15h.
4. Commercial concrete as a building material product must participate in the market competition must consider economics, and the lowest price under the premise of ensuring technical performance. The general requirements for commercial concrete are: stable, reliable, suitable and economical.
The traditional concrete mix design method (ie, the assumed volumetric method and the absolute volume method) is based on strength, that is, the mix ratio is designed according to the "water-cement ratio rule". The proposed full-computation ratio design method is based on workability, strength and durability. The calculation formula of water consumption and sand rate is derived from the concrete body model, and the two formulas are combined with the water-cement ratio rule. Achieve full calculation of the composition and mix ratio of FLC and HPC. Compared with the traditional design method, the full calculation method makes the concrete mix ratio design from semi-quantitative to full quantitative, and from experience to science. Compared with the traditional mix design, the full calculation method is more convenient and quicker to obtain an optimized concrete mix ratio.
DSPOF produce differnt of Fiber Optic Light,alos include the Sauna lighting kits.
The Fiber Optic Sauna Ceiling light are safe for use in wet and humid areas as no heat or electricity is present in the fibre optics or fittings, but the illuminator which contains the electricity, must be located outside the main sauna or steam room.
Sauna lighting is something of a specialist field. This is because the heat of the sauna will cause most traditional light sources to fail. To illuminate a sauna safely and effectively, one must either use a fibre-optic lighting system, or use specialist sauna LED's. Furthermore, getting the light levels and in turn the ambiance in the sauna right, is crucial to the enjoyment of the sauna itself.
Sauna Ceiling Light,Sauna Lighting Kits,Sauna Room Kit,Sauna Light Kit
Jiangxi Daishing POF Co.,Ltd , https://www.jxopticfibrelight.com