4—economy of lightweight concrete

... lightweight) The generic name of concrete or concrete products having lower densities than normalweight concrete products (See concrete, structural lightweight, and concrete, lightweight) 1 .4—Economy ... therefore, part of the mixing water 2.3.8 Modulus of elasticity of lightweight aggregate particles—The modulus of elasticity of concrete is a function of the moduli of its constituents Concrete may ... design Concrete, structural lightweight aggregate—See concrete, structural lightweight Concrete, structural lightweight (SLC)—Structural lightweight- aggregate concrete made with structural lightweight...

Ngày tải lên: 24/10/2014, 15:47

... curve of concrete in compression; (b) average stress-strain curve of concrete in tension; (c) average stress-strain curve of steel bars in concrete; (d) average stress-strain curve of concrete ... strength of this concrete should be established to prevent web-crushing failures The strength of this concrete is a function of 1) the presence or absence of cracks and the orientation of these ... rotating angle softened-truss model considers the reorientation of the crack direction that 445R-24 MANUAL OF CONCRETE PRACTICE Fig 3.9—Constitutive laws of concrete and steel: (a) softened stress-strain...

Ngày tải lên: 24/10/2014, 17:26

... resistance of the concrete and is a measure of the force necessary to start the movement of the concrete The h-value is the relative viscosity and is a measure of the resistance of the concrete ... of gravitational acceleration (g) .68 Table 4.1 – Properties of non-air entrained concrete with a w/c of 0.35 (Series I) .80 Table 4.2 – Properties of non-air entrained concrete with a w/c of ... Principles of measurement in BML viscometer 31 2.3.2 Limitations in measurement of rheological parameters of fresh concrete 35 2.4 2.5 VIBRATION OF FRESH CONCRETE 46 2.6 SLUMP OF FRESH...

Ngày tải lên: 16/09/2015, 08:30

... penetrability of concrete for three different types of concretes: normal weight granite concrete (NWC), lightweight aggregate concrete (LWAC) and recycled aggregates concrete (RAC) The penetrability of concrete ... 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 ... history of lightweight aggregate concrete There are many applications of lightweight aggregate concrete Some structures that have used lightweight aggregate concrete include: the Roxburgh Country Offices...

Ngày tải lên: 13/10/2015, 15:55

... shortening of concrete d creep of concrete e shrinkage of concrete f relaxation of steel The amount of prestress loss due to these causes depends on a number of factors that include, properties of the ... derailment, kip (kN) Base of Napierian logarithms Modulus of elasticity of concrete, psi (Pa) 358.1R-3 Section 5.6.3 Eci = Modulus of elasticity of concrete at Es = Modulus of elasticity of reinforcement, ... The fracture of a continuously welded rail Concrete, specified compressive strength of J$ - Compressive strength of concrete used in design and evaluated in accordance with Chapter of ACI 318 is...

Ngày tải lên: 24/10/2014, 21:58

... Stress-Strain Curves of Concrete 5.4.2.2 Compressive Strength Reduction Coefficient of Cracked Concrete 5.4.2.3 Confinement Effect of Concrete 5.4.2.4 Biaxial Effect of Concrete 5.4.2.5 Tension ... definition of high durability concrete A concrete bucket is commonly used for the placement of column concrete, and placement of concrete not more than about 50 cm deep and compaction by means of an ... warehouse in Kobe, designed by Naoji Shiraishi, a professor of civil engineering of the University of Tokyo and a member of the Institute of Civil Engineers of the Great Britain, and constructed in 1906...

Ngày tải lên: 27/04/2016, 23:02

... of forms and placement of coarse aggregate, McArthur Bridge, Detroit, Michigan 4.2-Preparation of concrete surfaces Fig 12 -Concrete preparation of an arch rib before removal of deteriorated concrete, ... Aggregate Concrete, ” Department of the Army Corps of Engineers, Office of the Chief of Engineers 12 Tirpak, Edward G., “ORNL-1739, Report on Design and Placement Techniques of Barite Concrete ... rupture of over 80 percent of that of a monolithic beam of the older concrete, and numerous cores taken from one concrete bonded to another and tested in bending nearly always break on one side of...

Ngày tải lên: 24/10/2014, 17:44

... midpoint of the FIR filter The frequency response of the type I Center of symmetry l (a) Center of symmetry l (b) Center of symmetry l (c) Center of symmetry l (d) Figure 5.7 Coefficients of the ... coefficients of the FIR filter This equation describes the output of the FIR filter as a convolution sum of the input with the impulse response of the system The transfer function of the FIR filter ... 5.5.1 Software Implementations The software implementation of digital filtering algorithms on a PC is often carried out first to verify whether or not the chosen algorithm meets the goals of the...

Ngày tải lên: 23/10/2013, 22:15

Ngày tải lên: 07/11/2013, 09:15

... Reinforced concrete 3.1 General 3.2 The historical development of reinforced concrete 3.3 General principles of reinforced concrete 3.4 Reinforced concrete in bending 3.5 The cracking of reinforced concrete ... 44 m diameter spherical concrete dome, resting on concrete walls that are some 30 m high In order to reduce the thrust of the roof, it is made of lightweight concrete, of which the density reduces ... function of each of the components of a bridge deck Chapters 10, 11, 12 and 13 describe the different types of bridge deck Chapters 14 and 15 are devoted to the methods of construction of bridge...

Ngày tải lên: 18/02/2014, 18:20

... recommendations for the design of steel and composite steel concrete structures as described in Eurocode 3: Design of steel structures and Eurocode 4: Design of composite steel concrete structures References ... thickness of a weld bolt force breadth outstand depth of web; diameter modulus of elasticity edge distance; end distance action; force strength of a material permanent action; shear modulus of steel ... structural behaviour of a steel element depends on the nature of the forces, the length and shape of the cross section of the member, the elastic properties and the magnitude of the yield stress...

Ngày tải lên: 14/03/2014, 13:20

... residues Analysis of the distribution of the electrostatic potential on the surface of the molecule reveals the ampiphilic character of the helix (Fig 4A) Schematic representation of the charge distribution ... (84% of residues), which is considered to be the active conformation of the hormone [38,40] The changes engineered in the sequence of the peptide, either through the nature of the side chain of ... exhibits NOEs of low intensity in respect with Cb2 (1.716 p.p.m) methyl, of the type dbN(i,i + 2) and dbN(i,i + 3) [39] Fig Analysis of NMR-derived data (A) Schematic representation of the sequential...

Ngày tải lên: 17/03/2014, 10:20

... (2005) 2050–2059 ª 2005 FEBS Sites for the design of inhibitors of PepX activity A B C D Fig Structures of enzymes of the clan SC The N-terminal domain of each enzyme is colored red, the catalytic ... active site of: (A) the crystalline structure of PepX from L lactis; (B) the modeled structure of PepX from S gordonii (C) Structure of PepX from S gordonii (orange) computed by MODELLER software, ... the active site of the human DPP-IV; 3, docked into the active site of the crystalline structure of PepX from L lactis; and 4, docked into the active site of the modeled structure of PepX from S...

Ngày tải lên: 23/03/2014, 13:20

Ngày tải lên: 23/03/2014, 20:34

Ngày tải lên: 01/05/2014, 21:25

Ngày tải lên: 12/05/2014, 23:57

Ngày tải lên: 13/05/2014, 03:01

... from toe of flange to centerline of web, h0 is the distance between centerline lines of flanges, h00 is the distance from centerline of flange to tip of stem, l1, l2 are the length of the legs of the ... thickness of the legs of the angle, bf is the flange width, tf is the average thickness of flange, tw is the thickness of web, Ic is the moment of inertia of compression flange taken about the axis of ... prevent out -of- plane movement of the beam at the braced points Out -of- plane movement consists of lateral deformation of the beam and twisting of cross-sections Lateral stability of beams can...

Ngày tải lên: 28/05/2014, 20:09