4-18 picture shows the relationship between the concentration of Ettringite of soil cement and CBA0 CBA20 found CBA20 is the intensity of higher concentration. CBA0 at all ages, curing, curing age 3 days and 7 the concentration of Ettringite in soil cement CBA20 volume increased rapidly. And still have the volume increased continuously and the devil 14 28 days. For curing period and long-term 90 120 days. Concentration increased only slightly for soil cement CBA0 at curing 3 days and 7 days. The volume is increasing concentration up a little, curing age and 14 28 days. Concentration still Mei up a bit and tends almost constant at the curing age and 90 120 days from the volume increase of Ettringite shows. CBA20 the bagasse ash as an ingredient. Can help increase the amount of the main products to more than of welding used ปูนซีเมนต์เพียง alone. Result in compressive strength development of higher By the description of Ettringite concentration of soil cement and CBA0 CBA20 shown table 4-7 for 4-19 picture shows the relationship between the concentration of Ettringite with compressive strength was found CBA20 concentration of Ettringite higher compressive CBA0 which more concentration. Ettringite lower, which is consistent with the test results of compressive strength and the concentration of the main products CSH.
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