The Constructor

TYPES OF CONSTRUCTION COST ESTIMATES

Gopal Mishra — Tue, 21 May 2013 15:58:26 +0000

Types of Construction Cost Estimates Construction cost constitutes only a fraction, though a substantial fraction, of the total project cost. However, it is the part of the cost under the control of the construction project manager. The required levels of accuracy of construction cost estimates vary at different stages of project development, ranging from ball(...)

Original Post at TYPES OF CONSTRUCTION COST ESTIMATES

CRITERIA FOR DESIGN OF EARTH DAMS

Gopal Mishra — Tue, 21 May 2013 14:06:56 +0000

The criteria for the design of earth dams are: 1. Sufficient spillway capacity and freeboard are provided so that there is no danger of overtopping of the dam 2. Seepage flow through the embankment is controlled so that the amount lost does not interfere with the objective of the dam and there is no erosion(...)

Original Post at CRITERIA FOR DESIGN OF EARTH DAMS

EARTHFILL DAMS & ITS CLASSIFICATION

Gopal Mishra — Tue, 21 May 2013 12:04:10 +0000

Earthfill dams are the most common type of dam built to any height. They are designed as a non-overflow section with separate spillway. The reason for such wide spread use of earthfill dams are: The foundation requirements are not as rigorous as other dams Local available soil is the main construction material High skill not(...)

Original Post at EARTHFILL DAMS & ITS CLASSIFICATION

PROSPECTS & USES OF PLASTICS IN BUILDINGS

Gopal Mishra — Mon, 20 May 2013 16:35:46 +0000

There are two types of Plastics, namely Thermoplastic and Thermosetting plastics distinguished by the physical property. Thermoplastics: This type can be softened by heating after they have been cured and remoulding cycle can in theory be repeated an indefinite number of times but in practice some defects may eventually take place. The curing process is(...)

Original Post at PROSPECTS & USES OF PLASTICS IN BUILDINGS

COMMON STRUCTURAL FAILURE CAUSES

Gopal Mishra — Mon, 20 May 2013 11:11:42 +0000

Many decisions in design are based on engineering judgement, but not only on the understanding of theory or any computational tools. Even experience in extensive design in academic context can provide only limited perspective in engineering decision making. Most lessons in engineering decision making come from the cases of histories of failures of structures, which(...)

Original Post at COMMON STRUCTURAL FAILURE CAUSES

CONCRETE CHEMICALS AND APPLICATIONS

Gopal Mishra — Mon, 20 May 2013 10:48:47 +0000

Concrete Chemicals (Admixtures) and Applications Admixtures are materials other than cement, aggregate and water that are added to concrete either before or during its mixing to alter its properties, such as workability, curing temperature range, set time or color. Some admixtures have been in use for a very long time in concrete construction, such as(...)

Original Post at CONCRETE CHEMICALS AND APPLICATIONS

TYPES OF CRACKS IN REINFORCED CONCRETE SLABS

Gopal Mishra — Sun, 19 May 2013 16:41:38 +0000

TYPES OF CRACKS IN REINFORCED CONCRETE SLABS 1. Cracks in reinforced concrete columns due to Steel Corrosion (cracks parallel to steel bars) 2. Cracks in reinforced concrete columns due to shrinkage of concrete 3. Cracks in reinforced concrete columns due to increased load on the slab 4. Cracks in reinforced concrete columns due to sulphate(...)

Original Post at TYPES OF CRACKS IN REINFORCED CONCRETE SLABS

DISTRESSES IN CONCRETE PAVEMENT

Gopal Mishra — Sat, 18 May 2013 12:01:52 +0000

CONCRETE PAVEMENT DISTRESSES a) Cracking Cracks in concrete pavements often result from stresses caused by expansion and contraction or warping of the pavement. Overloading, loss of subgrade support, and insufficient and/or improperly cut joints acting singly or in combination are also possible causes. Several different types of cracking can occur: (i) Longitudinal, Transverse, and Diagonal(...)

Original Post at DISTRESSES IN CONCRETE PAVEMENT

GREEN ROOFING – A STEP TOWARDS SUSTAINABILITY

Gopal Mishra — Sat, 18 May 2013 08:38:18 +0000

A green roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage and irrigation systems. (The use of “green” refers to the growing trend of environmentalism and does(...)

Original Post at GREEN ROOFING – A STEP TOWARDS SUSTAINABILITY

FIBRE REINFORCED CONCRETE IN PAVEMENTS

Gopal Mishra — Fri, 17 May 2013 14:05:58 +0000

Fibre reinforced concrete (FRC) is defined as a composite material consisting of concrete reinforced with discrete randomly but uniformly dispersed short length fibres. The fibres can be made of steel, polymer or natural materials. Woven fabrics, long wires, bars, and continuous wire mesh are not considered discrete fibres. FRC is considered as a material of(...)

Original Post at FIBRE REINFORCED CONCRETE IN PAVEMENTS

PROJECT MANAGEMENT TERMS & DEFINITIONS

Gopal Mishra — Fri, 17 May 2013 11:14:55 +0000

Microsoft Project is a project management system, which assist the project managers to execute and control the project activities effectively in order to meet the sponsors needs and expectations from a project. Project management involves the planning, scheduling and controlling of the activities in a project Planning – Defining the objectives of the project and(...)

Original Post at PROJECT MANAGEMENT TERMS & DEFINITIONS

PUMPED CONCRETE PUMP TYPES & SELECTION

Gopal Mishra — Thu, 16 May 2013 16:25:41 +0000

Pumped concrete is the concrete which is transported to heights by means of pumping using concrete pumps. This method is used where large quantity of concrete work is involved at greater height, where other means of transporting is not easy to do. Concrete pumps have been known for more than 50 years. In modern times,(...)

Original Post at PUMPED CONCRETE PUMP TYPES & SELECTION

PROJECT MANAGER & PROJECT MANAGEMENT

Gopal Mishra — Thu, 16 May 2013 14:21:01 +0000

A project is a temporary endeavor undertaken to achieve a particular aim. At the most basic level, a project is actually the response to a need, the solution to a problem. Further it is a solution that promises a benefit especially financial benefit. The fundamental purpose for most projects is to either make money or(...)

Original Post at PROJECT MANAGER & PROJECT MANAGEMENT

APPLICATIONS OF STEEL FIBER REINFORCED CONCRETE

Gopal Mishra — Thu, 16 May 2013 12:23:30 +0000

APPLICATION OF STEEL FIBER REINFORCED CONCRETE STEEL FIBER FOR PRE-CAST CONCRETE APPLICATION: Manholes, Risers, Burial Vaults, Septic Tanks, Curbs, Pipes, Covers, Sleepers APPLICATIONS IN OTHER STRUCTURES: A) Highway And Airfield Pavements: Repair of existing pavement. Reduction in pavement thickness. Increase in resistance to impact. Increase in transverse and longitudinal joint spacing Smooth riding surface. B)(...)

Original Post at APPLICATIONS OF STEEL FIBER REINFORCED CONCRETE

CONCRETE MIX DESIGN USING CRUSHED SAND

Madhulika Sinha — Wed, 15 May 2013 14:40:03 +0000

The process of selecting suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required, strength, durability, and workability as economically as possible, is termed the concrete mix design. The proportioning of ingredient of concrete is governed by the required performance of concrete in 2 states, namely(...)

Original Post at CONCRETE MIX DESIGN USING CRUSHED SAND