Explanation of epoxy grout label and sampling methods

Epoxy grout label level including C3 and C5, C7. 5、C10、m12. 5、C15甜,这件C30、C40。 The greater the corresponding value, the greater the strength grade. Epoxy grout can be divided into masonry, plastering and joint according to the use, has nothing to do with the class. , say what, if anything, can only say that high strength of epoxy grout with high-grade epoxy grout, and vice versa. For a project of thousands of cubic meters of rubble masonry epoxy grout and tens of thousands of cubic meters of brick masonry epoxy grout the epoxy grout strength sampling sampling, as follows. 1, the strength of the cement grout epoxy. Epoxy grout rubble masonry 56 randomly selected group. Block are made at the scene, 28 days compressive strength to maintain the same conditions. Epoxy grout rubble masonry strength grade for C5, cement is 325 slag Portland cement. The used sand, medium sand (60%), spinning yarn (40%), silt content is 3% 5%, the mixing ratio of cement, sand = 18. 5. Sampling inspection results: strength of more than 10 CPA group of 20. 3%, the highest intensity 15 CPA, is three times the design strength of; Of the total number of sampling sites that do not meet the strength grade of 16. 2%, the average compressive strength of 6. 8 CPA, 36% higher than the design strength grade. Although the workability of cement grout epoxy, precipitation and water easily, but better than cement mix epoxy grout, especially in the underground building rubble foundation or the water. Because of lack of water surface of rubble, the consistency of epoxy grout is very small, will flow. In addition, the stone material surface is irregular, the mortar seam width is higher. Therefore, the appropriate consistency of epoxy grout for 20 ~ 30 mm, epoxy cement grout are best suited for gravel base. Q2, cement mix epoxy grout, thousands of square meters brick masonry block group, a total of 42. In the case of design strength grade C5, cement, lime, sand mixture ratio of 10. 69. Cement dosage is 185 kg/m3, much of which is 325 slag Portland cement. In the fine sand content is 50%, the silt content 5% ~ 8%. According to the compressive strength of block statistics, 16. 3% of the specimens more than design strength grade, the highest intensity of 8. 5 CPA, the minimum strength of 2. 8 CPA, 28 days average intensity is 6. 2 mpa, 24% above the design strength. In the construction engineering, epoxy grout strength checking can accurately evaluate actual strength of masonry. Masonry did not meet the design strength, can be processed in a timely manner, to ensure the engineering quality, strengthen field management have certain effect.