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增加羥丙基甲基纖維素的保水效果

2014/7/17 17:18:18

羥丙基甲基纖維素在幹粉砂漿中,纖維素醚的增加量很低,但能明顯改進濕砂漿的功能,是影響砂漿施工功能的一種首要增加劑。如今,羥丙基甲基纖維素在幹粉砂漿中運用的纖維素醚首要是羥丙基甲基纖維素醚(HPMC)。羥丙基甲基纖維素在幹粉砂漿中HPMC首要起著保水、增稠、改進施工功能等作用。羥丙基甲基纖維素HPMC不參加任何化學反響,隻起輔佐作用。膩子粉加水,上牆,是化學反響,由於有新物質的生成,把上牆的膩子粉從牆上弄下來,磨成粉,再用,就不行了,由於現已構成新的物質(碳酸鈣)了。灰鈣粉的首要成分是:Ca(OH)2、CaO和少數CaCO3的混合物,CaO+H2O=Ca(OH)2 —Ca(OH)2+CO2=CaCO3↓+H2O 灰鈣在水和空氣中CO2的作用下,生成碳酸鈣,而HPMC隻是保水,輔佐灰鈣非常好的反響,其自身沒有參加任何反響。
Hydroxypropyl methyl cellulose in dry mortar, increase the amount of cellulose ether is very low, but can improve the wet mortar obvious function, construction function is a main agent mortar. Now, using hydroxypropyl methyl cellulose in dry mortar cellulose ether is hydroxypropyl methyl cellulose ether (HPMC). Hydroxypropyl methyl cellulose in dry mortar HPMC first play water, thickening, improving the construction function. Hydroxypropyl methyl cellulose HPMC does not participate in any chemical reaction, only the adjuvant action. Putty powder in water, on the wall, is a chemical reaction, the formation of new substances, the upper wall putty powder down from the wall, ground into powder, then, can not, because now constitute a new substance (calcium carbonate). The first component is: Ca (OH) is a mixture of 2, CaO and a few CaCO3, CaO+H2O=Ca (OH) 2 - Ca (OH) 2+CO2=CaCO3 ↓ +H2O ash calcium in the water and the air under the action of CO2, to produce calcium carbonate, and HPMC just water, help calcium very good response, its own did not participate in any repercussions.

質量的甲基纖維素能均勻且有效地渙散在水泥砂漿和石膏基商品中,並包裹所有的固態顆粒,且構成一層潮濕膜,基中的水分在適當長期逐漸開釋,與無機膠凝資料發作水合反響,然後確保資料的粘結強度和抗壓強度。所以,在高溫夏日施工中,為到達保水作用,需按照配方充足增加高質量的HPMC商品,不然,會呈現枯燥過快而導致的水化不行、強度下降、開裂、空鼓和掉落等質量問題,同時也增加工人施工難度。而隨著氣溫下降,能夠逐漸減水HPMC的增加量,並且能到達相同的保水作用
The quality of the methyl cellulose can be uniformly and effectively slack in cement mortar and gypsum based products, and coated solid particles all, and form a layer of wet film, medium water in appropriate long-term gradually release, and inorganic cementitious material hydration reaction attack, then make sure the material bonding strength and compressive strength. Therefore, in the high temperature in summer construction, to achieve water conservation function, need not increase according to the formula enough high quality HPMC products, will appear dull, over hydration, strength decline, not cracking, hollowing and drop the quality problems caused, but also increase the difficulty of construction workers. But as the temperature drops, can gradually decrease water HPMC increased, and can reach the water retention of the same

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