Author name: prajapatiseema390

BS 1881-104 Part 104: Method for determination of Vebe time

Scope:- Specifies the method for determining the initial surface absorption of oven-dried specimens and of concrete that cannot be oven dried. Test for determining the initial surface absorption of concrete initial surface absorption  The rate of flow of water into concrete per unit area after a stated interval from the start of the test and …

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ASTM D1640/D1640M :- Drying, Curing, or Film Formation of Organic Coatings

These test methods cover the determination of the various stages and rates of film formation in the drying or curing of organic coatings under laboratory-controlled conditions of air temperature, (low, ambient, and/or elevated) and/or humidity. Procedures for assessing drying under prevailing conditions of temperature and humidity in the shop and field are also described. Substrate, …

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ISO 15184 : Determination of film hardness by pencil test

Pencil hardness:-Resistance of the surface of a paint film to marking, or the formation of some other defect, as a result of the action of a pencil, with a lead of specified dimensions, shape, and hardness, which is pushed across the surface Principle:- A pencil lead with a defined geometry is pushed over the paint …

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How to Store Tile Adhesive at Site level ?

Adhesive is hygroscopic in nature and therefore can easily absorb moisture from the air hence it requires protection from dampness and humidity as it can lose strength and form lumps. In most construction projects godowns are constructed at the site for storage of a few days requirements of Adhesive. The wall must be plastered and …

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Screeds, Bases and in-situ Floorings :- BS 8204

This part of BS 8204 gives recommendations for constituent materials, design, work on-site, inspection, and testing of concrete bases that are to receive in situ wearing screeds of the following types: a) concrete (see BS 8204-2); b) polymer modified cement (see BS 8204-3); c) terrazzo (see BS 8204-4); d) mastic asphalt (see BS 8204-5); e) …

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Preparation of Concrete Surfaces before Waterproofing System

The success of a waterproofing application depends on, among other things, the type, smoothness, and cleanliness of the concrete surface being coated. Adhesion Inhibitors  Form release agents, such as oil, grease, wax, and silicones, will transfer from the forms to the surface of the concrete during casting. These will cause poor adhesion of waterproofing systems. …

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What is the difference between Control and Expansion Joint ?

  Control Joints:- Control Joints are used to bear the movement of concrete when concrete shrinks during curing.  A joint of 3 to 5 mm is generally cut with the help of a diamond concrete saw blade called Saw cut. The depth of the cut must be 1/4 times the full depth of the slab.  …

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Application properties of Tile Adhesive

Shelf life:-  Time of storage under stated conditions during which an adhesive is expected to maintain its working properties. Maturing time:- Interval between the time when the cementitious adhesive is mixed and the time when it is ready for use. pot-life:– Maximum time interval during which the adhesive can be used after mixing. Open time:- Maximum …

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Why do floor tiles cracks ?

Reason   Hollowness behind the tiles   Falling of heavy object  Expansion and contraction   Tiling with Cement  Poor tiles material  Solution  Use Adhesive in place cement  Proper tile application as per the manufacturer’s instruction.   Good quality tiles   Take care of heavy loads.

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