TAILIEUCHUNG - Research on manufacturing dry mixed cement mortar with high compressive strength, high flexural strength, low shrinkage and high watertightness for restoration of damaged hydraulic structures in Vietnam

That is suitable for the restoration of concrete structures in general and hydraulic structures in particular of Vietnam. The dry mixed mortar is manufactured and in bag of 15± kg weight. Keywords: dry mixed cement mortar, compressive strength, shrinkage, flexural strength, adhesion, watertightness, high range water reducing admixture (HRWR), polymer acrylic. | Vietnam Journal of Mechanics , VAST , , (2008), pp. 99 - 111 RESEARCH ON MANUFACTURING DRY MIXED CEMENT MORTAR WITH HIGH COMPRESSIVE STRENGTH, HIGH FLEXURAL STRENGTH, LOW SHRINKAGE AND HIGH WATERTIGHTNESS FOR RESTORATION OF DAMAGED HYDRAULIC STRUCTURES IN VIETNAM Nguyen Quang Phu 1 12 , Hoang Pho Uyen 3 , Jiang Lin Hua 1 , Liu Jiaping 4 1 College of Materials Science and Engineering, Hohai Unive rsity, Nanjing, . China (210098) 2 Faculty of Hydraulic Engineering of Water Resources University, Vietnam 3 Research of Building Material Science Department, Institute of Water Resources Research, Vi etnam 4 Jiangsu Research Institute of Building Science, Nanjing 210008, China . Abstract. Usi ng normal materials to manufacture the mixed mortar is necessary for restoration of hydraulic structures in Vietna m . It will salvage the materials and decreases the cost price of the mortar. In this research, we used cement m ade in Vietnam (Chinfon - Haiphong cement), na tural sand (Lo River sand), polymer acrylic and high range water reducing (of SIKA company)' with proportion 1 : 3 : : by weight. The water to cement ratio is , which always ensure t he compressive strength of mortar more t han 40 MPa and small shrinkage, good watertightness, and high adhesion. That is suitable for the restoration of concrete structures in general and hydraulic structures in particular of Vietnam. The dry mixed mortar is manufactured and in bag of 15± kg weight. Keywords: dry mixed cement mortar , compressive strength , shrinkage, flexural strength , adhesion , watertightness , high range water reducing admixt ure (HRWR), polymer acrylic. 1. INTRODUCTION After fifty years, many hydraulic structures in Vietnam were damaged and downgraded that why it is necessary to repair them for continuing operated. Here the most important hydraulic structures are made of concrete and reinforced concrete, that when repairing has required the same m aterials having the same .

• Kiến trúc - Xây dựng
• 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
• Dang Dinh Ang
• Nonlinear analysis and mechanics
• Dynamic problems involving stationary cracks
• The Wiener Hopt technique
• Dual integral equations
• Dual integrals in non linear fracture mechanics
• Non linear fracture mechanics
• Energy release rate
• Discuss the obtained
• The alpha finite element method (αFEM)
• Solid mechanics using triangular and tetrahedral elements
• Suitable computational cost
• NS FEM makes
• The upper bound property
• Non linear constitutive problems in solid mechanics
• Non linear constitutive problems
• Languages Gibian and special operators
• The application FEM
• Betts miller janjic convective parameterization scheme
• H14 31 model to forecast heavy rainfall in Vietnam
• Betts Miller Janjic
• Three rain seasons
• Standard gradient models and crack simulation
• Standard gradient models
• The propagation of cracks
• Damage mechanics and crack simulation
• The interaction between two parametric excitations
• The second and third degrees
• The asymptotic method of nonlinear mechanics
• Dynamic system governed
• Comparison of two hydrological model simulations
• Nam and Xinanjiang for Nong Son catchment
• The Central Vietnam
• The runoff components
• 3 D numerical simulation
• The tidal circulation
• The gulf of Tonkin
• The kinetic energy distribution
• Duality in the analysis of responses to nonlinear systems
• The analysis of responses
• The original nonlinear systems
• The study of nonlinear mechanics
• Aerodynamics of a wing in surface effect ship
• Theory and experiment
• Wing in surface effect ship
• The aerodynamic characteristics
• The Institute of Mechanics
• The error estimate
• The convergence rate for h
• p refinement
• The finite element analysis
• Three dimensional elastostatic mechanics problems
• Some initial experimental results
• Free water layer formation in horizontal pipes
• Water layer formation
• Hanoi Institute of Mechanics
• Bending vibration of beam elements under moving loads
• Considering vehicle braking forces
• Fluctuations of structures
• Beam elements according
• Continuous element for vibration analysis
• Thick shells of revolution
• Continous Element Method
• Finite element solutions
• Natural frequencies and harmonic responses
• Cast3m implementation of the extended finite element method
• The extended finite element method for cohesive crack
• Quasi brittle materia
• The proposed implementation
• The displacement discontinuities
• Buckling analysis of simply supported composite laminates subjected
• In plane compression load
• A novel mesh ffree method
• Alternative numerical technique
• Mesh free method
• A three story building
• Hedge algebras based fuzzy controller
• The structural system
• The El Centro earthquake
• Three story building against earthquake
• Laminar separation phenomenon combining with numerical calculations
• The turbulent separation
• The laminar separation
• Experimental study on mechanical properties
• Three phase polymer composite reinforced
• Glass fibers and titanium oxide particles
• Polymer composite reinforced
• Three phase composite
• Dynamic characteristics of elastically supported beam subjected
• A compressive axial force and a moving load
• The implicit Newmark method
• The Galerkin finite element method
• The axial force
• Eccentrically stiffened functionally graded plates and shallow shells
• Von Karman Donnell sense
• The formulation of governing equations
• The classical shell theory
• Mathematical modelling and control of the evolution
• Dynamic systems interacting with medium
• Mathematical modeling evolutional systems interacting
• Two conjugate mechanical subsystems
• Evaluating structural safety based on fuzzy set theory
• Evaluating structural safety
• The fuzzy reliability
• Simple beam structure