Abstract：The glass powder of different colors was used to replace cement to make concrete samples.The compression strengths of samples were tested and the microscopic analysis of cement paste was carried out.The test results show that the 28 days compression strength of the samples was higher than those of the reference concrete samples when the contents of the glass were 10% and 15% respectively, and the compression strength was equal to the reference concrete when the content of glass was 20%, and strength went down as the glass content was 30% and above.Ca (OH) 2 was well crystallized in the concrete when the glass was not added, and the crystals had relatively large size.However, as the content of the glass in the concrete went up, Ca (OH) 2 content in the concrete decreased, the crystallization of Ca (OH) 2 became worse.Different colors of glass powder had little effect on the compress strength of the concrete.

Keyword：waste glass powder;cement paste;strength;