Table 2 The physical and chemical indexes of raw materials.
From: Durability and microstructure of polymer-based cement joint sealant
Solid content/% | Viscosity/mPa, s | pH | Tg/°C | MFFT/°C | Average particle size/μm | ||
|---|---|---|---|---|---|---|---|
Styrene-acrylic emulsion and VAE emulsion | |||||||
Styrene-acrylic emulsion | 56 ± 1 | 400–1800 | 7.0–8.5 | − 7 | 0 | 0.1 | |
VAE emulsion | 55 ± 1 | 1500–5000 | 4.5–6.0 | − 10 | 0 | 1.5 | |
Setting time/min | Stability | Flexural strength/MPa | Compressive strength/MPa | ||||
|---|---|---|---|---|---|---|---|
Initial setting time | Final setting time | 3d | 28d | 3d | 28d | ||
Cement | |||||||
141 | 296 | Qualified | 6.7 | 9.1 | 32.2 | 54.6 | |
Particle size/μm | SiO2 content/% | MgO/% | |||||
|---|---|---|---|---|---|---|---|
Talc powder | |||||||
20 | 60 | 30 | |||||
Particle size/μm | CaCO3 content/% | ||||||
|---|---|---|---|---|---|---|---|
Calcium carbonate | |||||||
30 | 99 | ||||||
Main component | Appearance | ||||||
|---|---|---|---|---|---|---|---|
Auxiliaries | |||||||
Dispersant | Polycarboxylate sodium salt | Light yellow liquid | |||||
Defoamer | Silicone | Grey and white turbid liquid | |||||
Filmforming aid | Texanol | Colorless clear liquid | |||||
