Strength of Modified Silicate Sand for CO<sub>2</sub> Hardening Process

Xu Jin

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Strength of Modified Silicate Sand for CO₂ Hardening Process
Issue 9, Pages: 671-673(2008)
Published： 2008 ，
DOI：

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[1]许进.CO_2硬化改性水玻璃砂粘结强度的研究[J].特种铸造及有色合金,2008(09):671-673+652.

Xu Jin. Strength of Modified Silicate Sand for CO₂ Hardening Process. [J]. Special Casting & Nonferrous Alloys (9):671-673(2008)
[1]许进.CO_2硬化改性水玻璃砂粘结强度的研究[J].特种铸造及有色合金,2008(09):671-673+652. DOI：

Xu Jin. Strength of Modified Silicate Sand for CO₂ Hardening Process. [J]. Special Casting & Nonferrous Alloys (9):671-673(2008) DOI：

摘要

研究了改性水玻璃砂的强度性能。其中

G代表普通水玻璃;18号为优选出来的用含有羧钠基的1号改性树脂改性的水玻璃;A1为用含有酰胺基的3号改性树脂改性的水玻璃;B2是用含有苯酚的2号改性树脂改性的水玻璃。试验结果表明

在相同的粘结剂加入量和吹气工艺条件下

初强度值的增大顺序为A1>18号>G>B2;终强度值的增大顺序为18号>B2>A1>G。比较起来18号的综合性能较为理想。随着吹气时间的延长

型砂初始强度不断上升

而终强度则逐步下降。随着吹气流量增大

初强度下降而终强度上升。

Abstract

The strength of modified silicate sand was examined. The results reveal that sequence of initial strength value of silicate sand is as follows: modified resin silicate sand containing -CONH2 polarity higher than modified resin silicate sand containing -COONa polarity higher than common silicate sand higher than modified resin silicate sand containing HO-O-CH2OH polarity

while the increasing sequence of final strength value is as follows: modified resin silicate sand containing -COONa polarity more than modified resin silicate sand containing HO-O-CH2OH polarity more than modified resin silicate sand containing -CONH2 polarity more than common silicate sand under the condition of the same binder addition and blowing. Comprehensive properties of modified resin silicate sand containing -COONa polarity is acceptable. In addition

with increasing in blowing time

the initial strengths of all mold sands are increased while the final strengths are decreased gradually. With increasing in blowing volume

the initial strength is declined while final strength is increased.