Drymixed Mortar&Concrete Technology Forum

13/05/2024

https://mortartech.com/threads/help-with-figuring-out-the-problem-of-cracking-putty-on-the-decorative-surface.158/

Please tell me about the problem of cracking putty on the decorative surface. The formula is : cement 400, quartz sand + heavy calcium carbonate gradation 600, Wacker redispersible polymer powder 3%, 20,000 viscosity cellulose ether 0.15%, water reducing agent 0.3%. 6mm glass fiber chopped...

30/04/2024

https://mortartech.com/threads/ordinary-plastering-mortar-strength.155/

Each ton of mortar contains 850 kg of machine-made sand, fineness modulus 2.6, 150 kg of 42.5 cement, and 130 kg of water. The workability is excellent, but the mortar on the wall has been applied for ten days with good surface strength. However, remove the surface of the mortar, the internal...

19/04/2024

https://mortartech.com/threads/improve-the-early-strength-of-inorganic-materials.97/

What additives can improve the early strength of Inorganic materials?

01/04/2024

https://mortartech.com/threads/tile-adhesive-does-not-dry-thoroughly.227/

425 350 90 mesh 600, stone powder 50, Wacker 6, 150,000 cellulose 2, starch ether 0.5, wood calcium carbonate 1, the sand is dolomite machine-made sand. I put the soaked bricks on for twelve hours, and the bricks can still be peeled off. The grout inside has not dried. Please give me some advice.

28/03/2024

https://mortartech.com/threads/please-correct-the-tile-adhesive-formula-if-there-is-any-concern-we-have-higher-temperatures-in-the-south-and-it-doesn%E2%80%99t-snow-in-winter.234/

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

20/03/2024

https://mortartech.com/threads/why-latex-paint-appears-with-yellow-spots-and-has-a-sour-smell.94/

The interior wall latex paint stored for three months has yellow spots and a sour smell on the surface, which is the smell of latex paint deterioration. They do not exist when it is newly produced. Three thousandths of the preservative and one-thousandth of the sodium benzoate are added to the...

23/02/2024

https://mortartech.com/threads/the-application-amount-of-redispersible-polymer-powder-rdp.93/

I'd like to know, what are the terrible consequences of the excessive addition of Redispersible Polymer Powder(RDP) to tile adhesive?

04/02/2024

https://mortartech.com/threads/what-is-the-role-of-calcium-formate-in-tile-adhesive.226/

What is the role of calcium formate in tile adhesive?

16/01/2024

https://mortartech.com/threads/the-open-time-of-tile-adhesive-cannot-pass-20-minutes-please-analyze-the-formula-below.224/

16/01/2024

https://mortartech.com/threads/the-open-time-of-tile-adhesive-cannot-pass-20-minutes-please-analyze-the-formula-below.224/

Cement 280，coal ash 70， graded sand 635， cellulose ether 2.5 Starch ether 0.5， early strength agent 4， redispersible polymer powder 8 Water addition 24.5%， temperature 27℃， humidity 55% The formula is as above: the original strength is 1.5, the freeze-thaw strength is 1.0, but the op...

04/01/2024

https://mortartech.com/threads/what-happens-when-plastering-mortar-walls-appear-beads.220/

What happens when plastering mortar walls appear beads?

02/01/2024

https://mortartech.com/threads/plastering-mortar-foaming.127/

After polishing the plastering mortar on the interior wall, the concrete wall will bulge in about 2 hours. I don't know what caused it. Cement 235, stone powder 58, machine-made sand 798, river sand 532, thickener 5.5, conditioner 2.5, water 200.