To study the rheological behavior of calcium ligno sulphonate

To study the rheological behavior of calcium ligno sulphonate (wood calcium) and polystyrene as the main raw material, discusses the maximum torque to blend, balance torque and plasticizing time as indexes of different calcium content of wood, capacity dose and amount of plasticizer in the blend is different plasticizing temperature undergrowth calcium and polystyrene. The results showed that 30% of wood calcium, 1.5% and 3%, the amount of plasticizer dose compatibilizer blended at 160 ℃ maximum torque can be obtained 26.5Nm, and balance torque of 6.0Nm plasticizing time of 130s is preferably co-mixed results. Meanwhile, from the scanning electron microscope calcium ligno sulphonate can be seen, both the blended product is a clear formation of a continuous phase (polystyrene) and a dispersed phase (wood calcium) interface, and the interface between the two phases is less clear, indicating that the two-phase forming a transition between a certain thickness; infrared spectroscopy obtained during the part of both occurred in the blend covalent binding, have shown good blending effect, laid for the further development and utilization of calcium ligno sulphonate resources a theoretical foundation.

Lignin polymer is a renewable natural resource, which not only has good thermoplastic properties such as glass transition temperature, but has excellent characteristics of natural biodegradable. Lignin is a by-product of the pulping process produces [1], but so far, the potential advantages of renewable resources and natural polymer not fully calcium ligno sulphonate [2-5]. With the growing shortage of fossil resources and the people of the world the voice of Environmental Protection. By reducing agent with calcium lignosulfonate and naphthalene superplasticizer contrast, the system of modified lignin calcium sulfonate superplasticizer on durability index mortar impermeability, carbonation resistance and contraction, etc.. The results calcium ligno sulphonate showed that: adding 0.4% calcium lignosulfonate superplasticizer modified mortar 90d permeability ratio of 220%, 28d carbonation depth of 25.5mm, 180d shrinkage ratio of 86%.

Further evaluation revealed through fuzzy math: optimal dosage, the doped modified calcium ligno sulphonate superplasticizer mixed mortar durability is superior to calcium lignosulfonate water reducer and naphthalene superplasticizer. Research calcium ligno sulphonate corrosion properties. Considering the price and environmental factors, the use of modified lignin calcium sulfonate superplasticizer have greater economic effects and environmental effects in mortar projects.

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