Penetrability of lightweight aggregate concrete

... surface of cross section -118- 900 21 50 21 50 27 5 D2 D1 1700 25 0 P 325 P 1800 1700 100 520 0 Beam s A1 and A2 21 50 21 50 900 27 5 P D2 D1 1700 1800 375 325 P 1700 520 0 Beam s B1 21 50 21 50 900 27 5 D1 D2 ... e2θ ; * v1 = v1 ; * v2 = v2 ; θ 1* = θ ; * 2 = 2 ; where e1 and e2 are the eccentricities of cable at the deviators and 2, respectively -114- (6.7) u2*,v2*,θ 2* Ca...

Ngày tải lên: 07/11/2012, 11:04

... [K 11 ] 1 ({ΔF1 } + {R1 } − [K 21 ]{ΔU }) (2.22) {ΔF2 } = [K 22 ]{ΔU } + [K12 ]{ΔU } − {R2 } (2.23) K 12 ⎤ K 22 ⎥ ⎦ ⎧ ΔU ⎫ ⎬ ⎨ ⎩ΔU ⎭ (1) ⎧ ΔF ⎫ ⎧ R ⎫ = ⎨ 1 +⎨ 1 ⎩ΔF2 ⎭ ⎩ R2 ⎭ ⎡ K 11 ⎢K ⎣ 21 Solving ... (3 .18 a) 12 K 6K 12 K 6K ⎤ ⎡ ⎢0; − L3 ; − L2 ; 0; L3 ; − L2 ⎥ ⎣ ⎦ 12 K 1+ L2 (3 .18 b) ⎡ 12 ⎛ 12 K ⎞ 6 12 ⎛ 12 K ⎞ ⎤ 0; − + x; ⎜ − − ⎟ + x; 0; − x; ⎜ − ⎟ + x⎥ ⎢ L⎠ L ⎦ 12 K L...

Ngày tải lên: 07/11/2012, 11:04

... 3.5.2 Isolate the concrete from vibration for the duration of the test 3.5.3 Obtain concrete from the simulated in-place concrete and perform slump every hour until slump has reached the ... in-place slump Recover the simulated in-place concrete with plastic after each slump test 3.6 Part B Mixer Truck 3.6.1 Discharge approximately cubic foot of test batch concret...

Ngày tải lên: 10/07/2014, 23:20

... the two rings are constantly in contact and as the concrete ring dies, strain gages monitor the steel ring strain In the finite element analysis the strain information was used as input using the ... the ring specimens using ANSYS software were modeled by cubic threedimensional as shown in Fig The elements of steel ring and concrete ring are continuous at nodes...

Ngày tải lên: 21/07/2014, 17:21

... restraint needed for shrinkage-compensating concrete To take full advantage of the expansive potential of shrinkage-compensating concrete in minimizing or preventing shrinkage cracking of exposed concrete ... use of shrinkage-compensating concrete are contained in ACI 223R CHAPTER 4 CONTROL OF CRACKING IN FLEXURAL MEMBERS 4.1—Introduction The control of crack...

Ngày tải lên: 24/10/2014, 15:46

... involvement before design Concrete, structural lightweight aggregate—See concrete, structural lightweight Concrete, structural lightweight (SLC) Structural lightweight-aggregate concrete made with structural ... kg/m3) (4-2) GUIDE FOR STRUCTURAL LIGHTWEIGHT-AGGREGATE CONCRETE 213R-13 Fig 4.2—Modulus of elasticity 1.5 Fig 4.1 Concrete density versus time of drying f...

Ngày tải lên: 24/10/2014, 15:47

... factors that influence corrosion of reinforcing steel in concrete, measures for protecting em- PROTECTION OF METALS IN CONCRETE AGAINST CORROSION 222R-3 bedded reinforcing steel in new construction, ... Mehta, P K., “Effect of Cement Composition on Corrosion of Reinforcing Steel in Concrete, ” Chloride Corro- PROTECTION OF METALS IN CONCRETE AGAINST...

Ngày tải lên: 24/10/2014, 16:04

... counterbalanced by the dead weight of the slab itself STANDARD PRACTICE FOR SHRINKAGE -COMPENSATING CONCRETE The function of the top reinforcement is to balance the restraint of the subgrade, in ... relieves the expansive strains caused by the initial expansion of the shrinkage -compensating concrete 1.3—Scope and limits This standard practice is dire...

Ngày tải lên: 24/10/2014, 16:04

... strain in the extreme compression fiber of a concrete element (0.003 in. /in. ) strain at first cracking load strain in prestressed reinforcement at ultimate flexure unit shrinkage strain in concrete ... nonprestressed reinforcement overall thickness of member depth of flange moment of inertia of cracked section transformed to concrete effective moment of inertia for...

Ngày tải lên: 24/10/2014, 17:25

... to unbonded FRP tendons 4.5.2 Deflections—Deflections of an uncracked concrete section reinforced with an unbonded FRP tendons may be computed using the guidelines of ACI 318 Once the section cracks, ... composite sections with in (25 mm) of concrete deck, failure occurred as a result of combined concrete spalling in the compression zone and shear between concrete inside...

Ngày tải lên: 24/10/2014, 17:25

... Gravity and Absorption of Fine Aggregate BATCHING, MIXING, AND JOB CONTROL OF LIGHTWEIGHT CONCRETE C 138 C 143 C 172 C 173 C 231 C 330 C 567 Standard Test Method for Unit Weight, Yield, and Air ... changes in the amount of water needed to produce the desired slump 3.2.1 Transportation and waiting time Construction BATCHING, MIXING, AND JOB CONTROL OF LIG...

Ngày tải lên: 24/10/2014, 17:44

... view of the lack of any performance history, the use of PA concrete was limited to the repair of bridges and tunnel linings to extend their usefulness After extensive laboratory testing, the Bureau ... requirements limit the amount of fine aggregate (sand) that can be used in the grout For PA concrete for use in beams, columns, and thin sections, the...

Ngày tải lên: 24/10/2014, 17:44

... CRACKING MODE AND SHEAR STRENGTH OF LIGHTWEIGHT CONCRETE BEAMS KUM YUNG JUAN (B.Eng (Hons.) Malaya) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL AND ENVIRONMENTAL ... Properties of Lightweight Concrete 23 2.4.1 Compressive Strength of Lightweight Concrete 23 2.4.2 Modulus of Elasticity and Poisson’s Ratio 25 2.4.3 Te...

Ngày tải lên: 10/09/2015, 15:48

... study on workability and stability of fresh lightweight aggregate concrete (LWAC) from rheology perspective It involves using rheological parameters of Bingham model, which are yield stress and plastic ... particles (Du and Folliard, 2005) and aggregate in normal-weight aggregate concrete In lightweight aggregate concrete (LWAC), however, the floatation...

Ngày tải lên: 16/09/2015, 08:30

... ratio, size of lightweight aggregate, density of lightweight aggregate and volume of lightweight aggregate has reasonable effects on penetrability properties of lightweight aggregate concrete The ... penetrability of concrete for three different types of concretes: normal weight granite concrete (NWC), lightweight aggregate concrete (LWAC) and recycl...

Ngày tải lên: 13/10/2015, 15:55