BASICS OF CONCRETE SCIENCE - CHAPTER 9 pot

... Structural-heat insulating 50 0-1 400 3. 5-1 0 0.1 7-0 .40 For enclosing structures Structural 140 0-1 800 1 5-5 0 0.5 8-0 .4 For load-carrying structures 173 Fig. 9. 1 Effect of bulk density of aggregate ... cellular concrete А ≈10, for non-autoclaved cellular concrete А ≈7,5 8,5. 183 9. 5. Cellular concrete Cellular concrete (gas concrete) has been sugge...

Ngày tải lên: 09/08/2014, 14:21

... Republik ( 192 8) 6 REFERENCE on the manuscript of book of Doct. of Tech. Science, Prof. L. Dvorkin and Doct. of Tech. Science O. Dvorkin Basics of Concrete Science By now concrete science became ... and polymer-cement concrete 8.4. Fiber reinforced concrete 8.5. Special concrete 9. Light-weight concrete 9. 1. Concrete on non-organic porous aggregates 9...

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... SnO 2 BeO - - - - - MgO - - - - CaO ++ ++ ++ ++ ++ ++ ++ ZnO - - - SrO ++ ++ ++ + + + + CdO - - - - - BaO ++ ++ ++ ++ ++ ++ ++ Note: fixed (++) and predicted (+) existence of binding ... of uniform dist ribution of entrained-air voids in concrete structure Accelerator of setting time Shorten the time of setting Ac...

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... index of degree equal 0,1 to 1). 46 2.2. Technological properties of concrete mixtures Fig. 2.6. Chart of methods of determination of structural- mechanical properties (workability) of concrete ... frequency of vibrations. 42 Fig. 2.1. Change of viscidly-plastic properties of concrete mixture depending on tensions: a – change of structural viscosity; b – change o...

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... forming Influence of chemical admixtures Fig.3.10. Kinetics of change of level of hydration of cement silicate phase: 1- without admixtures; 2- calcium nitrite-nitrate (3%); 3- calcium nitrite-nitrate–chloride ... cement; 2- capillary pores; 3- cement hydrate gel a b 67 3.4. Optimization of concrete structure Concrete structure is a cover-up of its stru...

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... ,kdd/Е 2/1 срср − =ν=σ where - tensile stress; E- modulus of elasticity; - effective energy of destruction; d as - average size of a crystal; ( ) 2/1 Ek − ν= - coefficient of viscidity of destruction. Strength of concrete ... Y.Bagenov offered the formulas of concrete strength : If C/W≥2.5 If C/W≤2.5 ( ) (4.8) ,5.0W/CАRR c − = ( ) (4 .9) ,5.0W/CRАR c 1 += wh...

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... influencing of size of unit, humidity of environment and age of concrete in the moment of loading began. 99 Fig.5.7. Effect of conditions of loading on magnitude of creep for typical normal-weight concrete ... deformation of shrinkage. 89 On the idealized chart of compression of cement stone it is possible to select three basic areas: a-b- absence of crac...

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... expansion. 1 09 Fig.6.2. Relationship between frost resistance and water-cement ratio (W/C) of concrete: 1 – Air-entrained concrete; 2 - Non-air-entrained concrete W/C Cycles of freezing and ... strength, rate of hardening, time and conditions of concrete hardening. 125 Durability of concrete in the terms of influence of aggressive environment is provided by...

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... equality of volume of the concrete mix to the sum of absolute volumes of the initial components of concrete, the second - conformity of volume of the cement - sandy paste (mortar) to volume of voids ... depending on quantity of the cement stone in concrete. Fig. 7.2. Effect of quantity of the cement stone in concrete on the value of creep: 1 – C...

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... 68 93 .6 New York 198 7 72 57 Toronto 198 7 69 70 Paris 198 8 36 70 Chicago 198 9 82 78 Guangow, China 198 9 63 70 Chicago 199 0 65 84 Frankfurt 199 0 58 45 Seattle 199 0 58 133 Frankfurt 199 1 ... 8.1 Examples of high-strength concrete application at the high-rise buildings construction City Year of construction Number of floors Concrete strength, MPa Montreal 198...

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