As the bending strength of sodium silicate sand cured by ester method is much higher than that cured by CO_2 method the analysis shows that the key point is the refinement of grains of silicate gel.
分析了酯法比CO2法水玻璃砂强度高的原因,指出充分发挥水玻璃粘结效率的关键在于细化水玻璃凝胶胶位。
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