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Feb 26, 2016 / Haseeb Jamal -

5 Travel Myths You Need to Stop Believing Right Now

Feb 26, 2016 / Haseeb Jamal -

Canal Comes Alive with Lighted Boat Parade.

Properties of a Good Sealant for Joints

Protection Durability Less expansion Good adhesion Chemical inertness Sound insulation - Air tight Must be of softer grade and not stiff Good wetting behavior Must be able to absorb thermal stresses

Dampness in Buildings and DPC

Rising damp is caused by capillary action drawing moisture up through the porous elements of a building's fabric. Rising damp, and some penetrating damp, can be caused by faults to, or the absence of a damp-proof course (DPC) or damp-proof membrane (DPM). It is continuous layer of impervious material applied to prevent moisture transmission. A common example is

Public Health Engineering

The public health engineering sector is responsible for the Collection of water, purification, transmission and distribution of water. A Public Health Engineer has to perform his job by calculating design flow, design population, design area and population density. Quality of the collected water is checked by physical and chemical tests on water and if the quantity is not

Sources of Fresh Water in Environmentl Engg.

The quantity of water available at the source must be sufficient to meet various demands and requirements of the design population during the entire design period. Plans should be made to bring water from other sources if the available water is insufficient.

Chemical Characteristics of Water

Hardness is the property that makes water to require more soap to produce a foam or lather. Hardness of water is not harmful for human health but can be precipitated by heating so can produce damaging effects in boilers, hot pipes etc by depositing the material and reducing the water storage and carriage capacity. Absolute soft water on the other hand is not acceptable

Design & Construction of Culverts

An opening through an embankment for the conveyance of water by mean of pipe or an enclosed channel. Generally selection and type of material depends on the comparative cost, location of structure, availability of skilled labor, time limitations.

Types of Primary Sedimentation Tanks

Some removal is essential in primary sedimentation tanks because of the grease and other floating matter which is present in wastewater. The sludge serapes can return along the length of the tank a the water surface. As they move towards the outlet end of the bank, the flights then move the sum towards a skimmer located just upstream of the effluent weirs.

Activated Sludge Process Design

The activated sludge form the underflow of the final setting tanks should be returned to the inlet of the aeration tanks at a rote sufficient to maintain the MLSS concentration at the design value. Excess activated sludge withdrawal system and subsequent treatment and disposal of waste sludge. Since the whole process takes place in a liquid medium the hydraulic

Stability of Earth Retaining Structures

It is strong in compression and weak in tension so no tension should be allowed in any part of the retaining wall, especially the base of the supporting wall. Earth embankments/slopes are commonly required on railways, roads, earth dams etc. The stability of these slopes must therefore be thoroughly analysed as their failure may lead to loss of human life as well as economic

Introduction to Cements and How to Store it

Cement refers to material which acts as a binding substance. In construction and civil engineering cement is used to bind structural members for construction of buildings, pavements, bridges, tunnels, roads and highways etc. Cement bags should not be stored in an enclosed area where the walls, roof and floor is not completely weatherproof. Cement bags must not be

Admixtures of Concrete & Cement

A material other than water, aggregates, or cement that is used as an ingredient of concrete or mortar to control setting and early hardening, workability, or to provide additional cementing properties. Admixtures are generally used to alter the properties of concrete (such as increased workability or reduced water content, acceleration or retardation of setting time,

Acoustic and Sound Proofing Materials

Materials which have substantially greater ability to absorb sound than other conventionally used materials (wood, glass, concrete) are called acoustic materials. A majority of tiles used for acoustic purposes are made from wood, cane fibers matted and bonded into sheets of various thickness ranging from (3/16) in to (5/4)in. The sheets are cut into tiles of different sizes.

Advanced Traveler Information System

ATIS for arterials provides information on arterial conditions (e.g., travel speeds, travel time, incidents) to motorists through such media as websites, radio, television, or personal devices. This limited dissemination is in part due to the lack of surveillance on arterial streets. Another challenge is the absence of a commonly understood method of describing

Uses of Base Cross Drain

A subsurface drain, generally perpendicular to the roadway alignment, designed to drain infiltrated water. Often needed at bridge abutments, toll plazas, and across the road on long downgrades. The main purpose of the cross-drain is to channel water from above the path to the lower side. The source of the water may be from small streams, springs, mossy

Minimum Steel Reinforcement in Concrete

The minimum amount of steel reinforcement is defined as that for which "peak load at first concrete cracking" and "ultimate load after steel yielding" are equal. In this way, any brittle behavior is avoided as well as any localized failure, if the member is not over-reinforced. In other words, there is a reinforcement percentage range, depending on the size-scale,

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