dry-mixed mortar

  1. A

    Why does ordinary plaster mortar crack?

    Here is the formula, P.042.5 cement: 144KG fly ash II grade:36KG yellow sand fineness around 2.0 : 820KG hydroxypropyl methyl cellulose ether :130 g K12:35g water: 154 wet density is 1698 The plastering has wall cracks in the inner layer of the construction site. The basement is intact. Workers...
  2. L

    Please help me to see the state of the mortar on the wall.

    The samples sent by the additive manufacturer lasted about 20 hours on the wall. The first one was that he put in cellulose ether, but he felt that the cement had been pulverized and the powder fell seriously. So the second one was better without putting in the cellulose ether. So the product is...
  3. A

    Please correct the tile adhesive formula if there is any concern (we have higher temperatures in the south and it doesn’t snow in winter)

    Formula is like below(unit:kg) 425 cement:350, calcium carbonate powder:50, 40~70 mesh sand：350， 70~140 mesh sand：250， Wacker 5044n：12， HPMC 4W：3， starch ether：0.3, water reducing agent:0.3, Calcium Formate:0.3
  4. A

    Ordinary dry-mixed mortar bulges and cracks, what's going on?

    As shown in the picture, the overall smearing is okay, but the bulge appears within a few minutes after plastering and where is prone to cracking the next day; even watering cannot solve the bulge. Does anyone know what's going on?
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