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What is the full form of AG in civil engineering?
In civil engineering, "AG" typically stands for "Aggregate." Aggregates are essential components in construction materials, particularly in concrete and asphalt, where they provide strength and stability. They consist of various materials, including sand, gravel, and crushed stone, and play a crucial role in the overall performance of construction projects.
Why steel is used to reinforce concrete?
Concrete reinforcing steel is commonly used in bridges, buildings, skyscrapers and road construction. Reinforcing concrete with steel significantly increases its strength in an economical and safe manner.
Difference of Sodium and calcium lignosulfonate in concrete application?
Calcium lignosulfonate in concrete action and dosage - Stone Refractories I. Calcium lignosulfonate water reduction in concrete reinforced role Calcium lignosulfonate and sodium lignosulfonate reducing agent is a surface-active agent, added to the concrete, due to the orientation of hydrophobic groups adsorbed on the surface of cement particles, so that the cement with a negative charge. Cement particles have the same charge in the charge repulsion exclusion from each other under the action of dispersion of cement in water the initially-formed into a dispersion structure floc structure, flocculation cohesion body of free water is released, so as to achieve the purpose of reducing agent. Observations show that lignin added to the concrete after mixing for 5 minutes more than 80% of the reducing agent is adsorbed, clearly visible under the electron microscope, the center point of significantly increased hydration, hydration evenly distributed, hydrated crystal fibers longer various microscopic characteristics. Thus, the adding of calcium lignosulfonate, leaving the pores free water evaporation is small, dense internal structure, that is, reduction of the porosity is clearly beneficial to increase the strength of concrete, cement improves the size and distribution of the pore structure conditions, the crystal growth rate slow, crystal growth more fully, and thus get more fibrous crystals interspersed with each other to form a strong network structure, so that the concrete strength significantly increased. Therefore, in concrete mixed with lignin superplasticizer, concrete mixture can reduce water consumption and reduce water-cement ratio, improved workability, is conducive to pumping, improve concrete strength, density and durability. Second, the lignin water reducer in concrete dosage and key performance indicators 1, to improve concrete performance: When the same amount of cement, concrete slump similar to the blank can reduce water consumption by 10-15%, 10-20% increase in 28-day strength, a strength of about 10%. 2, saving cement consumption: When the concrete strength and slump similar, can save about 10% of cement, use one ton of cement water reducing agent can save 30-40 tons. 3, to improve the workability of concrete: When the amount of cement concrete and water consumption constant, low plasticity of concrete slump can be increased about twice (by a 3-5cm up to 8-18cm), early strength and undoped who was close. 4, lignin retarding effect: 0.25% lignin superplasticizer mixed after the slump in keeping basically the same, the initial setting time 1-2 hours delay ordinary cement, slag cement 2-4 hours, and finally 2 hours setting time of portland cement, slag cement 2-3 hours, if not reduce water consumption and increase the slump, or when the slump while maintaining the same amount of cement used to save, then the setting time delay greater extent than less water greater. 5, can reduce early hydration heat: exothermic peak are longer than the delay undoped, about 3 hours of Portland cement, slag cement about 8 hours, 11 hours or more concrete dam, the exothermic peak maximum temperature and not miserable by comparison, ordinary cement is slightly lower, slag cement and cement dam were lower than 3 ℃ 6, concrete air content increased: blank concrete air content of about 1%, 0.25% lignin mixed concrete air content of 2.3 percent. 7, the bleeding rate decreased: in concrete slump basically the same case, the doped lignin bleeding rate than those who are not doping can be reduced more than 30%, while maintaining the same water-cement ratio, increasing slump situation , it is also due to the introduction of air lignin hydrophilic and other reasons, the bleeding rate. 8, shrinkage performance: initial (1-7) days compared with non-water-reducing admixture, was close to or slightly decreased, 28 days and late (except saving cement above), a slight increase, but the increase values ​​did not exceed 0.01% (0.01mm / m). 9, to improve the density of concrete, improve concrete impermeability. By the B = 6 grade up to B = 12-30 level. 10, no chlorine salt, no corrosion of steel hazards. Usage of lignosulfonates on the base of sodium, relating to the hydrofilizing plastificators, at the concrete manufacture and dry construction mixtures lets to reduce the consumption of components up to 10-15%. Demixing of the concrete mass reduces and its solidity rises, the speed of hardening slows down. They insert additives of lignosulfonates in the quantity of 0,15-0,20%, it is necessary to insert superplastificators from the mass of dry substance in the quantity of 0,5-2,0% from the mass of dry concrete. When replacing superplastificators by lignosulfonates the solidity of concrete rises up to 20-25%, freeze resistance - in 3-4 times and the cost of mixtures reduces cause of adding of small amount of lignosulfonates, what is connected with their adsorbtion on the surface of hard phase. Usage of lignosulfonates reduces humidity of raw mud if conserving its flow behavior, what rises the manufacture of stove and reduces specific flow volume to the burning of clinker. With the usage of intensifier on the base of lignosulfonates the production of grinding units rises and there is an opportunity to change expensive and deficit chemical products. more information please visit:www.greenagrochem.com
What film technicians role is most like the role of the foreman in the construction of a building?
The Director
Difference between load bearing wall and framed structure?
Load bearing structures are structures where the loads are transferred to the foundation via load bearing walls(external and internal). These type of structures have a smaller window to walls ratio. Since the loads are borne by the walls the height of walls are limited. Framed structures are structures where the loads are transferred to the foundation via beams and columns. So beams and columns play a major role here. The loads in floor is transferred to the beams and then columns. These type structures can have large open areas in the walls. These type of structures can be adapted in high-rise buildings.
What major role did Brad Pitt play in the movie Troy?
the major role he did is to be the role of ACHILLES
What gasses play a major role in the destruction of the ozone layer?
Greenhouse gases play a major role. They react with ozone and deplete it.
What is one major characteristic of a society that is highly secular?
Answer this question… Religion does not play a major role in many citizens' lives.
The kidneys play a major role in maintaining?
The kidneys actually play a major role in maintaining blood pressure. The kidneys are also responsible for flushing out toxins from the body.
What organisms play a role in the nitrogen cycle?
Producers (incorporate it into organic) and bacteria play a major role in the nitrogen cycle.
Is TCS play a major role in Automation Sector?
TCS is a major IT industry in India.
Does the ocean currents play a major role on earths rotation?
no
What role do birds play in marine ecosystems?
Birds play a major role in the marine ecosystem by eating fish and passing bird droppings.
What are roles of drying ingredients in mayonnaise?
Drying ingredients play a large role in the production of mayonnaise. For example, dried eggs are used in many brands to add flavor.
What role does tobacco play in Jamestown?
Tobacco was a major exportin Jamestown.
What major role did Henry clay play in 1820?
missouri compromise!
Does Titania play a major role in a midsummer night dream?
Yes
