【正文】 erating phase, the second inducement phase and the second accelerating phase. The main hydrate products were CSH gelatin, C3AH13, AFt, AFm, albite, and micro plagioclase. 1. Introduction China increases its cement production each year. It is estimated that cement production will be 800850 million tons by the year 2021, equaling nearly half of the world total cement output. One ton of cement needs about ton of portland cement clinker, which requires one ton of CO2. From 1995 to 2021, the cement industry in China will add billion tons of CO2 to the earth’s atmospheric l ayer, about half of the world discharge amount. With this amount of CO2 production, we can see how the Chinese cement industry influences the environment. We must find a way to strictly limit the output of portland cement clinker in the future. One of the goals of this research is to research and develop a environmentprotecting binding material. Low activity waterhardened slag and heavy slag have not been used efficiently. The current method for discharging and stacking the slag pollutes the environment. So pounding nonclinker or littleclinker environmentprotecting unbaked cement by stimulating the activity of slag it would be a significant innovation. The purpose of this research is to pound environmentprotecting unbaked cement with the waterhardened slag, the primary raw material, and the pound activated agent by simple grindingmix technology (., omitting calcinations process) and to explore the hydrate mechanism of the environmentprotecting unbaked cement. 2. Raw Materials and the Main Properties of the Environment英文資料原文及翻譯 41 protecting Unbaked Cement Waterhardened slag from the Hancheng iron factory was used for this research and its chemical position is listed in Table 1. The basicity coefficient and mass coefficient were found by calculating the chemical ponent by and , respectively. The slag is acidic. The fineness of the selected slag was mm, and the sieve residue was 2%. Table 1: Chemical ponent for waterhardened slag SiO2 Al2O3 Fe2O3 CaO MgO MnO Alkalescence coefficient Quality coefficient Ratio (%) Xray diffraction of the slag is shown in Fig. 1. Analysis shows that 65% of the slag is noncrystalline, with significant amounts of active SiO2 and active Al2O3 present. Inaddition, there is about 35% gehlenite and 4% hemative in waterhardened slag, so it is a type of lowactivity slag. According to experiments, the authors chose active booster B and C. Different ponents of fines are mixed for 8 minutes in a ball crusher. The mortar strength test for environmentprotecting unbaked cement is detailed in specification ISO679. The standard quality for sand and water used as cementing material are 450g, 1350g, and 225 g. The result of the 英文資料原文及翻譯 42 experiment is shown in Table 2. We can see that the optimum proportion of active booster B is % and active booster C %, the pressive strength of 3d and 28d is and MPa, respectively。 the bending strength of 3d and 28d is and MPa. The cement conforms the national strength grade standard (GB13441999) for portland cement. Table 2: Paste strength under different mix proportion The other technological properties measured by Chinese national standard GB/T13461989 indicate that water consumption for standard consistency is 152 ml, higher than water consumption for ordinary portland cement. Initial set time is 78 minutes and final set time is 135 minutes, both a little longer than ordinary Portland cement set times. Volume stability passes the pat test. Overall, properties of this cement conform pletely to the demands of Chinese national standards. 3. Hydrate Reaction and Mechanism Analysis of Environmentprotecting Unbaked Cement The activity level of waterhardened slag depends on its chemical position and internal structure (noncrystalline content). The slag demonstrates a rapidcool effect when mucked out. It forms a loosely ted glass structure with many apertures. It can be described by the Zachariasen threedimensional distorted ted structure. Waterhardened slag is hydrated when the sharp reaction of active agent and OH1 ions is initiated by the agent when OH1 enters the aperture of the ted glass structure. The hydration mechanism of cement can be analyzed by determining the change in OH1density (pH value) in the cementwater system and the hydrate heatreleasing xray diffraction experiment indicates that the main hydrates of the 28dayold cement include CSH Aft C3AH3 Afm albite and microplagioclase, etc. As 英文資料原文及翻譯 43 seen in Fig. 2, the main hydrates are CSH and AFt. In addition, the cementwater system pH value and the cement heat of hydration are determined by studying the cement hydrate and water (1:50) solution, which indicates the curve of the pH value change as seen in Figure 3. The heat of hydration for the cement is determined using the method formulated by the Chinese national standard board. When environmentprotecting unbaked cement is mixed with water, the excitation medicament acts rapidly in water and releases ions such as OH, Na+, and SO42. The pH value of the system increases rapidly and the hydration reaction occurs at the same time. The OH ions in the solution get into the reticular formation gap of the waterhardened slag’s vitreous body , acts with the activity silicaalumina positive ions, scatters, and dissolves the slag’s reticular formation, dissolving out Ca2+ and forming CSH, Aft, C3AH3, albite, and micro plagioclase. Meanwhile, the Ca2+ ions in solution increase, causing oversaturation of the CSH and hydration calcium aluminate, making the hydrate condense and increase. In slag, 2CaO?Al2O3?SiO2 reacts with the SO42Ca2+Na+ ions and forms AFt and CSH