TAILIEUCHUNG - Microstructures and mechanical properties of polymer modified mortars under distinct mechanisms

In this study, two types of acrylic latexes, PA (polyacrylate) and PU/PA (polyurethane modified PA), are investigated in their influences on mechanical properties of mortar under different interaction mechanisms. In light of a previous study, the polymer–cement hydrates interaction mechanisms in PA and PU/PA modified mortars are illustrated respectively, and the microstructures are simulated using a computer model. Through mechanical experiments, it is revealed that the incorporation of polymer tends to reduce the compressive strength and elastic modulus except PA at low P/C ratio, while improve the flexural strength and toughness. As compared with PA, PU/PA is more effective in these influences. All of the influences of PA and PU/PA on mechanical properties can be explained successfully based on the interaction mechanisms and microstructures. In addition, it’s also found that the compressive strength of polymer modified mortar can be roughly estimated based on a modified gel/space ratio, and the incorporation of polymers does not change the relationship between elastic modulus and compressive strength. A hightemperature curing procedure is concluded to be suitable for preparation of high-performance cement composites in short period. | Microstructures and mechanical properties of polymer modified mortars under distinct mechanisms

• Kiến trúc - Xây dựng
• Microstructures and mechanical properties
• Polymer modified mortars
• Distinct mechanisms
• Microstructures are simulated
• The compressive strength
• The effect of joint thickness
• Other factors on the compressive strength
• The compressive strength of brickwork
• Brickwork is developed quantitatively
• Four brick prisms declines
• Vietnam Journal of Mechanics
• Manufacturing dry mixed cement mortar
• High compressive strength
• High flexural strength
• Low shrinkage and high watertightness for restoration
• Damaged hydraulic structures in Vietnam
• Effect of the high temperatures
• High temperatures on the microstructure
• Compressive strength
• High strength fibre concretes
• Impact of the high temperatures
• Ordinary Portland cement
• Fly ash
• Concrete mass
• Compressive strengthdevelopment
• Cement replacement
• Strength development
• Wood ash blended cement
• Soft computing models
• Predict strength parameters
• High strength mortar
• Ground granulated blast furnace slag
• Flexural strength
• Rapid chloride ion penetration
• Ultrasonic pulse velocity
• tiêu chuẩn xây dựng
• standard
• tiêu chí kỹ thuật
• specification
• vật liệu xây dựng
• testing
• thí nghiệm xây dựng
• C109
• C109M
• compressive
• strength
• bền nén
• Rapid prototyping
• Resilient back propagation algorithm
• Swarm intelligence
• Compressive strength improvement
• FDM process
• Concrete compressive strength
• Initial setting time
• Composition of initial materials
• Analysis of variance
• Genetic algorithm
• An Khanh TPP
• Bottom ash
• Cao Ngan TPP
• Replacement materials
• Power plants to replace natural sand
• Replacement material
• Extreme learning machine
• Artificial neural network
• Multilayer perceptron
• Support vector machine
• Navie Bayes
• Decision Tree
• Construction material
• Granulate blast furnace slag
• Hydration reaction
• Unconfined compressive strength
• Alternative material
• High strength concrete
• ACI method
• DMDA method
• Design for high strength concrete
• Environmental advances
• Husk ash incorporated high
• Strength self compacting concrete
• Environmental impact assessments
• Polymer bonded explosive
• Hexogen and fluoroelastomers
• Polymer bonded explosives based
• Explosive characteristics
• Dented stringer stiffened cylinder
• Residual strength
• Tension leg platforms
• Axial compression
• Residual strength formulation
• Khối lượng bê tông
• Cường độ chịu nén
• Bond strength
• FRP to concrete
• Gaussian process regression
• FRP thickness
• Granulated blast furnace slag
• Concrete mixture
• Bulk specific gravity
• Soft soil
• Shear strength
• Direct shear test
• Experimental study
• Underground construction concrete
• Mechanical properties
• Fiber reinforced plastic
• Tensile strength
• ILSS properties
• Failure modes
• Interlocking concrete brick
• Waste incineration bottom ash
• Visible defect
• Bending strength
• Water absorption
• Surface abrasion