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STRUCTURAL CONDITION ASSESSMENT AS A TOOL FOR …

condition assessment for demolition and underpinning design. 4 . ... Repair, and Rehabilitation of Existing Concrete Structures 10 . ... Substantial structural damage to vertical members of the gravity-load resisting system Damage less than substantial structural damage,


Support and Connection Types - Massachusetts Institute …

And yet, the conditions at each of the supports greatly influence the behaviour of the elements which make up each structural system. Structural steel systems have either welded or bolted connections. Precast reinforced concrete …


HardiePanel Vertical Siding - James Hardie Pros

HardiePanel® Vertical Siding INSTALLATION: Fastener Joint Treatment Position fasteners 3/8 in from panel edges and no closer than 2 in away from corners. Do not nail into corners. • HardiePanel vertical siding must be joined on stud. • Double stud may be required to maintain minimum edge nailing distances.


Thermal conductivities under unsaturated condition and ...

In this study, the thermal conductivities of cement-based grouts for backfilling of vertical ground-heat exchangers were investigated under the saturated, air-dried and unsaturated conditions. The mechanical properties including the p-wave velocity, elastic modulus and Poisson's ratio also were measured.


Vertical Impermeable Barriers (Cutoff Walls) - …

Cement-bentonite (CB) slurry walls are a common form of vertical barriers in Europe, especially for seepage control in the UK (Garvin & Hayles, 1999; USEPA, 1998). They were initially used for water exclusion but now their use has …


Seepage field 3D finite element simulation of concrete faced rockfill dam under failure condition of vertical fracture[J]., 2011, 32(11): 3473-3478. 0


Cement Types - Portland Cement Association

For portland cement types, ASTM C150 describes: Cement Type Description. Type I Normal. Type II Moderate Sulfate Resistance. Type II (MH) Moderate Heat of Hydration (and Moderate Sulfate Resistance) Type III High Early Strength. Type IV Low Heat Hydration. Type V High Sulfate Resistance. For blended hydraulic cements – specified by ASTM C595 ...


Vertical vs. Horizontal Foundation Cracks: Which is Worse ...

Identifying vertical cracks (caused by settling), early on, may often be repaired quickly and effectively before they turn into bigger issues and permanent structural damage. Horizontal cracks will generally move along a wall, to the …


Steel Reinforcement for Walls - Horizontal Rebars ...

Separate cross sections of all walls. Each cross section should clearly show the size of block used (i. e. 4, 6, 8, or 10 inch) for the building inspector and installer. Each cross section should show the wall heights involved for every …


Solved A 12-ft-tall concrete wall with a vertical back is ...

Transcribed image text: A 12-ft-tall concrete wall with a vertical back is to be backfilled with a clean sand that has a unit weight of 126 lb/ft^3, an effective cohesion of 0, and an effective friction angle of 36 degree. The ground behind the wall will be inclined at a slope of 2 horizontal to 1 vertical. Using Rankine's method, compute the normal and shear forces per foot acting on the …


The effect of hardhats on head and neck response ... - …

We evaluated the effectiveness of hardhats in attenuating head acceleration and neck force in vertical impacts from large construction objects. Two weight-matched objects (lead shot bag and concrete block) weighing 9.1 kg were dropped from three heights (0.91 m, 1.83 m and 2.74 m) onto the head of a …


CONCRETE BLOCK MASONRY

Vertical bars of 8-16 mm mild steel are inserted in the grooves of bricks, steel plates of 2-3 mm thickness or stirrups of 6mm dia. are provided to anchor the bars at every 4th course of masonry of piers. Cement mortar with rich mix of (1:3) is used.


Guidelines for Dowel Alignment in Concrete Pavements

percentages of the length of the dowel or thickness of the concrete. Many states have adopted the Federal Highway Administration (FHWA)-recommended limits for horizontal and vertical alignment (rotation) of ¼ in over 12 in (6.3mm over 305mm) or 2% (FHWA 1990). The American Concrete Pavement Association (ACPA) recommends


Vertical Concrete Mix for Resurfacing Walls - Concrete …

Most vertical mixes are composed of a blend of cement, graded lightweight aggregates, polymers and admixtures. Some are also fiber-reinforced. They are mixed with a paddle or mortar mixer and then applied with a hand trowel, similar to plaster, or even with a shotcrete gun, depending on the size of the area to be resurfaced.


Reinforced Concrete Shear Wall Analysis and Design

Reinforced Concrete Mechanics and Design, 7th Edition, 2016, James Wight, Pearson, Example 18-2 Design Data f c' = 4,000 psi normal weight concrete f y = 60,000 psi Slab thickness = 7 in. Wall thickness = 10 in. Wall length = 18 ft Vertical reinforcement: #5 bars at 18 in. on centers in each face (A s, vertical = #5 @ 18 in.)


Earth Pressure and Retaining Wall Basics for Non ...

condition develops and the lateral pressure against the wall decreases with wall movement until the minimum active earth pressure force (Pa) is reached. • As the wall moves towards (into) the soil backfill (right side of Figure 2), the passive condition develops and the lateral pressure against the wall increases with


Condition Monitoring increases availability of vertical ...

Integrated Condition Monitoring can help increase the availability of vertical mills (in the picture with vertical mill with Flender EMPP drive) Siemens Limestone, clinker or coal: the cores of vertical mills that crush such materials …


A Design Example for a Rectangular Concrete Tank PCA ...

Vertical Moment: coef = 149 Mu = 70,034 lb-ft/ft Horizontal Moment: coef = 99 Mu = 46,533 lb-ft/ft The maximum shear in the wall is obtained from the maximum shear coefficient from page 2-17 of PCA-R, in this case Cs = 0.50. The wall will be designed for the concrete to resist the entire shear force.


Expert PID Control of Grinding Condition for Cement ...

This paper proposed a controller design method based on expert PID to automatically control the load and quality of cement vertical mill. This method is applied to a cement plant in Guangxi Province. The operation results show that the designed controller can ensure the stability of the system to increase the cement output and reduce energy …


Plug Cementing: Horizontal to Vertical Conditions | SPE ...

While the Boycott effect and an extrusion effect were observed to be predominant in inclined wellbores a spiraling or "roping" effect controls slurry movement in vertical wellbores Ultimate success of a cement plug can be obtained if allowances are made for these effects in the job design. provided all other previously published recommended ...


Design Data 6 - Concrete Pipe

conditions, over the circular shape commonly used for sewer and culvert pipe. For minimum cover conditions, or where vertical clearance is limited by existing structures, horizontal elliptical and arch pipe are particularly suitable since the vertical heights are less than the height of hydraulically equivalent circular sizes.


Lecture 2: Stresses in Pavements - Reza S. Ashtiani

Based on Burmister's solutions, vertical stresses are greatly influenced by the modular ratio (i.e., E 1 /E 2). Vertical stress decreases considerably with increase in modular ratio. For example, based on the plot provided in the next slide: for z/a=1 and E 1 /E 2 = 1, s


Lecture 2: Stresses in Pavements - Reza S. Ashtiani

Foster and Ahlvin (1954) developed charts for computing vertical, tangential and radial stresses. The charts were developed for μ = 0.5. This work was subsequently refined by Ahlvin and Ulery (1962) allowing for evaluation of stresses and strains at any point in the homogenous mass for any μ.


Steel Reinforcement for Walls - Horizontal Rebars ...

Vertical and horizontal reinforcing steel bar sizes, spacing and grade of steel should be clearly marked for every storey in each wall cross section or in a separate note on other sheets. The placement of reinforcing steel, especially …


Analysis of Pile Foundation Subjected To Lateral and ...

soft soil strata. The pile is subjected to both vertical and horizontal forces. The objective of the current study is Lateral& Vertical loaded analysis of pile by using various methods. Vertical load analysis of pile is done by P-Y curves and Vesic's methods in cohesive& cohesion less soils with different soil parameters.


When and when not to vertically integrate | McKinsey

Vertical integration is a risky strategy—complex, expensive, and hard to reverse.Yet some companies jump into it without an adequate analysis of the risks. This article develops a framework to help managers decide when it is useful to …