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Under the same cement content, the stabilized soils, made of the soils with similar physical properties, may be significant difference in the strength. In this research, three groups of soils were selected, and the soils in each group are similar in physical properties. Strength and ions concentration in pore solution of the stabilized soils were investigated. The result reveals that calcium hydroxide (CH) concentration in pore solution of the stabilized soils might not reach to saturation due to soil consuming Ca2+and thus cause calcium silicate hydrates gels (C-S-H) and calcium aluminates hydrates gels (C-A-H) to form less. The cementitious hydrates are the main strength contributors of the stabilized soils. The Strengths of stabilized soils, the soils bearing similar physical properties, were almost identical as long as the CH concentrations in pore solution were saturated. The effect of chemical factors of soil on the strength of stabilized soil can be briefly attributed to the change of CH concentration in pore solution, and be further attributed to the influence of CH concentration on the amount of C-S-H and C-A-H formed in stabilized soils.

Since reform and opening up for more than 30 years,tremendous progress in human development has been made,while also facing the double pressure of energy shortage and environmental pollution. Based on this situation,government has introduced a series of energy conservation and emission reduction policies.Therefore, energy saving has aroused widespread concern. Policy research on the implementation of energy saving has become a hot issue of academia.In this context,evaluation of energy-saving emission reduction policies has important theoretical and practical significance.It can provide theoretical support and decision for the state making energy-saving emission reduction policies.

Since the electricity coal prices in China liberalizing, the negotiation between coal enterprises and electricity enterprises is often an impasse on the annual coal ordering meeting, which causes "the conflict of coal". The two sides each sticks to his argument on coal prices without mutual concessions, and eventually broken the deadlock by the government to step in price negotiations, or the two sides finally signed contract in few number, even amount of priceless. Coal and power are seen as important energy of our country, the standoff relation between coal and electricity will affect the entire national economy development. Under this background, what the conflict of coal and electricity prices impact will make on national economic development has become a problem that worth exploring.

In chemical engineering field, ettringite (AFt) formation effect the stabilization of sulfate rich soil mixed with cementitious materials. The different stabilizer compositions and twice molding technics may avoid and repair the destruction caused by AFt with decreasing the production rate of calcium silicate hydrates(C-S-H) and eliminating the void in stabilized soils. The results show that the strength of stabilized 5% sodium sulfate bearing soils, under above methods, are not less than that of the control ones, and the specimens keep steady after soaking in 5% sodium sulfate solution for 12 weeks.

The feasibility of utilizing industrial waste to produce soil stabilizer with high added value is discussed from technical effect, economic benefit and production and management mode. Principle of design of the stabilizer with industrial waste is offered based on the properties of stabilized soil structure formation and its special demand on stabilizer components; the examples of the stabilizer composition are presented, and the performance/cost ratio of the stabilizers are compared with that of cement. Reasonable production and management mode for industrially producing the stabilizer with industrial waste is discussed also. It is suggested that as long as appropriate industrial waste is selected intentionally to meet the special demand on the stabilizer composition needed to form stabilized soil structure, the soil stabilizer with high performance/cost ratio can be obtained. It is advised that the stabilizer should be designed individually according to the properties of the soil to be stabilized, the stabilizer should be produced with the production mode of mixing multi-components and adopt the management pattern of incorporating designing, production and sale.

This study discusses the hydrogen-producing properties of continuous stirred tank reactor (CSTR) after inoculating the Biohydrogenbacterium R3. Biohydrogenbacterium R3 grow well and produce H2 stably at temperature of (35±1)°C and HRT of 6 hours. In this study, the optimum range of pH is 4.5~4.6. The amount of biogas production and H2 content maintained at 3.4 L and 47%, respectively. The main liquid end products are ethanol and acetic acid. Dry cell weight changes showed wavy. COD removal is about 16%～18%.