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3) responds to the assured source of life degree having a spot test on the admeasurements concrete at the regular intervals collapsing in the process being under construction , construction is middle if Yu rains or other cause, respond to the ratio determining whose water ratio, and adjusting the composition being under construction in time when change happened in sandstone moisture content.
4) project uses the commodity concrete , has boundary have raised a concrete stirring mass and of all kinds effect apposition agent adulterating falls when amounts , the water ash having controlled a concrete strictly collapsing.
5) concretes concrete adopt a pump to have given handicraft , effective avoiding a concrete producing the phenomenon isolating Mi Shui and leaving out thick fluid in the process of transportation.
2.4 Matters needing attention in being under construction
1) construction school assignment soft and floury is pided .Water-proof concreting should stratify strictly being in progress, and a continuous construction is completed. The front and back and high and low connect between the tier should subjugate within the cement initial setting time. For this purpose, with handling a worker piding into several, at the same time each other, school assignment group faces or it is all right for each other, carry on the back.
2) Achieve strictly fixed point determines the amounts of the components of a substance material down According to the vehicle capacities stratifying concrete altitude and the means of transport, the quantify carrying out fixed point strictly is able to go down one important ring expecting that this is to improve water-proof concreting mass.
3) insist that you go down material opening the door or use string to expect that under barrel (chute)Be to prevent a cement paste from parting from aggregate for , to expect that liberty should not exceed 1.5 ms now and then highly under water-proof concrete. The water-proof structure reinforced bar is concentrated Should concrete altitude when higher, respond to according to the material stipulating that you go down material opening the door on form board or using string of barrels (chute) to fall, prevent a cement paste from parting from aggregate for , avoid at the same time also the cement paste or the concrete accumulating the place and cement paste alternating in the reinforced bar loosely splashing sticky Yu form board with outside. Now that material is difficult under bringing about a later, the surface affecting structure glossy becomes in the future leakage hidden trouble.
4) concretes vibrating beat one important ring being to ensure that the concrete is closely knit , defend against to seep with a stick. Also, should adopt fixed point vibrating, handle meticulously on basis expecting that under determining the amounts of the components of a substance homogeneously in fixed point .Pay attention to high and low tier of linking up. Now that needing to prevent from miss and vibrating, not vibrating enough, being going to prevent a fault from vibrating again, Need to forbid using prying the method coming to aid to vibrate moving a reinforced bar or shaking a reinforced bar especially, such separates to making the front already concrete the reinforced bar and concrete shaking the reality part, causes serious consequences.
5) being ready for the assured source of life degree taking over thick fluid measure, adjusting in time to collapse seriously. Average water-proof concrete structure construction, the construction joint being under construction respectively , composing namely on erecting wall sells be bottom board and vertical wall at reduced prices. Should irrigate thick a layer of 5 cm ~ 10 cm surname indicia cement mortars in seam place first linking up closely knitting tier, in order to ensuring that the seam place vibrates when concrete vertical wall. Simultaneous, improve step by step with concrete an altitude'. Should fall off step by step with the water yield, diminish collapsing to fall degree prevent from concrete insist to be short but the cement paste is partial to much phenomenon to aggregate appearing on upper part.
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