Essay about Analysis Of M S H Binder

1904 Words May 13th, 2016 8 Pages
III. RESULTS AND DISCUSSION
A. Influence of specific gravity to water to binder ratio of M-S-H binder
In development of M-S-H binder with magnesium oxide and silica fume, it is noted that silica fume has rather low specific gravity (S.G) and bulk density compared to Portland cement (PC). Thus, use of high silica fume content in the binder consequently results in a binder system of low specific gravity and bulk density, compared to PC.
The light weight binder leads to a difference in water to binder ratio (by mass), compared to PC. To compare water content by mass of M-S-H and PC, let’s consider a given water amount in a fixed binder volume V¬b, calculation of the difference of water to binder ratio by mass is derived from (4): (4) where Vb = absolute volume of the binder wMSH = weight of M-S-H binder in a binder volume of Vb wPC = weight of PC binder in a binder volume of Vb
S.GMSH = specific gravity of M-S-H binder
S.GPC = specific gravity of PC
If mixes with PC and M-S-H binder have the same amount of water (w), (4) can be rewritten as: (5)
By transform of (5), the relation of water to binder ratioby mass of the two binder systems is obtained: (6) where (w/b)MSH = water to binder ratio of M-S-H binder mix
(w/b)PC = water to binder ratio of PC mix
Equation (6)shows that the deviation of water to binder ratio of M-S-H binder and PC is dependent on the ratio of specific gravity of Portland cement and M-S-H binder. The decrease of…

Related Documents