5 FACTORS CAUSING DISINTEGRATION OF CONCRETE

CAUSES OF DISINTEGRATION OF CONCRETE The primary reasons that cause disintegration of concrete member are desribed below. 1. SULPHATE ATTACK Soluble sulphates are present in Ground water Soil Clay bricks Soluble sulphates react with Tricalcium Aluminate of cement I n the presence of moisture and form products which occupy much bigger volume than that of […]

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from CivilBlog.Org http://civilblog.org/2017/07/22/5-factors-causing-disintegration-concrete/
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HOW TO MINIMISE THE DEFECTS IN PLASTERING WORK?

Minimising Defects in Plastering Work Defects in plastering work can be minimised by following the below mentioned techniques. The brick and plastering work should be carried out by skilled masons in the best workmanship manner. Bond of brick work should be properly maintained. Efflorescence is removed by rubbing brushes on the damaged surface. A solution […]

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from CivilBlog.Org http://civilblog.org/2017/07/21/minimise-defects-plastering-work/
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SITE ENGINEER’S CHECK LIST FOR QUALITY BRICKWORK

BRICKWORK CHECK LIST FOR SITE ENGINEERS While on site, a site engineer must ensure that the brickwork is going on as per quality requirements. Some of the general requirements of quality of brickwork are mentioned below. Use this as a checklist while executing brickwork. The thickness of joint in brick masonry should not exceed 1 […]

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from CivilBlog.Org http://civilblog.org/2017/07/19/site-engineers-check-list-quality-brickwork/
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4 PRIMARY CEMENT COMPOUNDS & THEIR ROLES

Compounds of Cement About 90-95% of a Portland cement is comprised of the four main cement minerals, which are C3S, C2S, C3A, and C4AF, with the remainder consisting of calcium sulphate, alkali sulphates, unreacted (free) CaO, MgO, and other minor constituents left over from the clinkering and grinding steps. The four cement minerals play very different […]

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from CivilBlog.Org http://civilblog.org/2017/07/14/4-primary-cement-compounds-roles/
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8 PRIMARY REQUIREMENTS OF FORMWORK

REQUIREMENTS OF FORMWORK – QUALITY, SAFETY & ECONOMY In the selection of materials for formwork, the three general principles of quality, safety and economy must be paramount. Material quality can ensure safety, and significantly contributes to the achievement of economy. Formwork failure can result in loss of life and always causes catastrophic financial loss. Some […]

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from CivilBlog.Org http://civilblog.org/2017/07/12/8-primary-requirements-formwork/
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6 IMPORTANT ENGINEERING PROPERTIES OF MORTAR

Properties of Mortar Properties of mortar which are sought for use in masonry are: workability, water retentivity, rate of stiffening, strength, resistance to rain penetration and durability. These properties have been discussed below explaining their effect on masonry. Choice of masonry mortar is governed by several considerations such as Type of masonry unit and its […]

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from CivilBlog.Org http://civilblog.org/2017/06/02/6-important-engineering-properties-mortar/
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DIFFERENT TYPES OF DEFECTS IN TIMBER

TYPES OF DEFECTS IN TIMBER Types of Defects in timber are grouped into the following divisions. 1. Defects due to conversion During the process of converting timber to commercial form, the following defects may occur. Chip mark: mark or sign placed by chip on finished surface of timber Diagonal grain: Due to improper sawing of […]

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from CivilBlog.Org http://civilblog.org/2017/05/30/different-types-defects-timber/
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PIG IRON, CAST IRON & WROUGHT IRON – WHAT’S THE DIFFERENCE?

1. Pig Iron The crude impure iron, which is extracted from iron ores, is known as pig-iron and it forms the basic material for the manufacture of cast-iron, wrought iron and steel. The pig iron is manufactured by the following operations (i) Dressing: Crushed into pieces 25mm, impurities of clay, loam and other earthy matter […]

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15 DIFFERENT TYPES OF LOADS ON BUILDING (IN SHORT)

TYPES OF LOADS External loads on a structure may be classified in several different ways. In one classification, they may be considered as static or dynamic. Static loads are forces that are applied slowly and then remain nearly constant. One example is the weight, or dead load, of a floor or roof system. Dynamic loads […]

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SPLITTING TENSILE STRENGTH TEST OF CONCRETE (IS-516)

Determine Splitting Tensile Strength of Cylindrical Concrete Specimens Objective: This method covers the determination of the splitting tensile strength of cylindrical concrete specimens Reference: IS: 516 – 1959, IS: 1199-1959, SP: 23-1982, IS: 10086-1982 Theory: Age at Test – Tests shall be made at recognized ages of the test specimens, the most usual being 7 […]

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