Application examples and functions of HPMC

Application examples of HPMC and its functions

HPMC is a kind of high molecular compound with water solubility, which is called water-soluble resin or water-soluble polymer. The general purpose of HPMC is to increase the consistency of the mixture by increasing the viscosity of the mixing water. It can form an aqueous solution or dispersion in the water, and the viscosity will become very large if a little is added to 1 liter of water. When HPMC is added to fresh cement mortar, the anti dispersion of fresh cement mortar becomes better and better with the content of naphthalene superplasticizer in HPMC.

What are the strength characteristics of concrete with HPMC

Taking the bridge foundation engineering of Dandong Tonghua expressway as an example, HPMC underwater non dispersible concrete admixture is applied, and the design strength grade is C25. The results show that when the cement dosage is 400 kg, silica fume is 25 kg / m3, the best dosage of HPMC is 0.6% of cement dosage, water cement ratio is 0.42, sand ratio is 40%, naphthalene superplasticizer output is 8% of cement dosage, the average 28 d strength of concrete specimen in air is 42.6 MPa, and the average 28 d strength of underwater concrete with 60 mm drop height is 36.4 MPa The strength ratio of concrete formed in water to that formed in air is 84.8%, which indicates that HPMC has obvious influence on concrete.