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- The technical requirements of these three kinds of cement are basically the same, the technical requirements are as follows: 1. Magnesium oxide: clinker in the magnesium oxide content of not more than 5%. 2. Sulfur trioxide: slag cement in the content of sulfur trioxide shall not exceed 4.0%; mountain cement, fly ash cement sulfur dioxide shall not exceed 3.5%. 3. Fineness: 80μm square hole screen sieve should not exceed 10.0%. 4. Coagulation time: the initial condensate not as early as 45min, the final condensate no later than 10h. 5. Stability: must be qualified by boiling test.s
Questions about civil engineering materials
- Slag cement clinker content is less than the portland cement, and the mixture at room temperature hydration reaction is relatively slow. Condensation hardening is slower. Early (3 days, 7 days) low strength, but in the late hardening (28 days later) due to increased hydration products to increase the strength of cement stone, and finally even more than the same standard ordinary cement. Slag cemens
Civil engineering materials, the material strength and brittleness to enhance the plastic reduction method
- Reinforcing steel cold (cold drawing, cold drawing), can improve the strength and brittleness; plasticity.s
Civil Engineering Materials
- And other materials, autoclaved aerated concrete block drying shrinkage, moisture expansion. In construction applications, if the drying shrinkage is too large, in the presence of constraints to prevent deformation, the shrinkage of the formation of the stress exceeds the tensile strength or bond strength of the product, products or seams will appear cracks. In order to avoid cracks in the wall, must be in the structure and construction to take certain measures. And strictly control the moisture content of the product when the wall is also extremely important, it is best to control the wall moisture content of 20% or lesss
Material science and civil engineering which is better?
- You can choose according to your hobby and your favorite area, or your own thoughtss
Civil engineering graduation, after work which test is good?
- Examination level Primary, intermediate, advanceds
What are the structural forms of common buildings?
- Steel structure: beams, columns, floor are steel, 'wall by the thin metal plate filled with light insulation material composition. So light quality, can be built super high-rise buildings.s
Civil engineering and new materials, which is a good job
- Obviously civil, our school is now the situation is graduated in 2017, the civil has been signed, the work tube has not yet begun. Said the prospects of the big tube, a little self-deception, civil construction of the size of the project manager is the vast majority of civil origin, the number of project managers can be ignored, the construction company executives are mostly civil, budget origin. To say that the real estate management of the dominant, just a little funny, real estate is simply not willing to go to the civil, to learn nothing, grow very slowly, most people are more willing to do a few years in the construction unit to go to real estate, Then much more understanding, the growth rate is much stronger than the tube. Since you have learned the civil estimate you know some, if you are a boy, not the kind of people who can not eat a bit bitter, it is recommended not to turn the work tube, the other pipe is relatively simple, the management of things want to learn to get started And soon, if necessary, can work to learn. Of course, the benefits of the work tube, graduated from the management of the degree, but like the general school of this degree of gold can not agree with the degree.s
What's the thickness of insulated plasterboard
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Mount the furniture corner guards on the table
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Cement board wall
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