Effect of property of the cement paste by adding polycarboxylate superplasticizer
Flocculated cement structure enclosing lots of water can be found in cement paste, which will influence fluidity and strength of concrete.
The surface must be tough, clean, dry and free from oil, grease, wax and other dirt. Use sanblasting, whetting or acid-wash to remove the floating cement paste.
First, an empirical relationship formula between the effective porosity and total porosity of cement paste is given based on the experimental results of concrete.
By blending Portland cement and pulverized dehydrated cement paste, a new kink of cementing material is obtained.
Stirring viscosimeter is employed to research the rheological property of fresh cement paste with different superplasticizers.
In the constructing of duct grouting for post-tensioning bonded prestressed concrete, the suitable cement paste is the most essential and important factor to guarantee grouting quality.
Taking nanometer clay material as the additive of concrete, the influences of nanometer clay material to fluidity of cement paste, mechanics, anti-permeability and anti-frozen properties of concrete is studied.
The content of soluble alkali in cement paste is lower than the optimal one.
The instantaneous Young's modulus and Poisson (ratio) of the cement paste are calculated by the direct average method and two-scale expansion method.
Experimental study on influence of fiber of different size on cement paste
Influence of the compound of aminosulfonic acid-based superplasticzer and water-retentive and thickening admixture to cement paste capability;
The microstructure of hydrate of cement paste was studied by FTIR reflection spectrum of microscope.
Under the conditions of higher water-cement radio, a certain consistency FDN high-range water reducer and hermetic surrounding, the cement paste did not set in a long time.
The addition of the treated chromic refuse with proper amount of sodium sulfate into cement paste has shown an important role in quicker water absorption and earlier hardening.
water requirement for normal consistency of cement paste
The long-term expansion of harden expansive cement paste should mainly attribute to the water absorption of gel-alike AFt.
Effect of mineral admixtures on the loss of water,shrinkage and relative humidity of the cement paste
