Concrete Shrinkage – Shrinkage of Concrete

Concrete Shrinkage – Shrinkage of Concrete Concrete shrinks during setting and drying due to hydration of cement and produces shrinkage cracks. The drying shrinkage increases with an increase in cement content or an increase in water content. Shrinkage is greater with riche...

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Slump Cone Test and its Advantages – Limitations

Slump Cone Test and its Advantages – Limitations Although, the slump cone test is not entirely satisfactory since it gives widely varying results and also does not give a true measure of workability but it is of value in the field as a control test and is useful in comparin...

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Concrete Bleeding – Bleeding of Concrete

Concrete Bleeding – Bleeding of Concrete Concrete bleeding is the appearance of a watery scum (also called laitance) on the surface of a concrete after compaction. It is- an indication that there is too much water or deficiency of fine material in the mix, or that too much ...

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Concrete Segregation – Segregation of Concrete

Concrete Segregation – Segregation of Concrete It is the separating of the coarse aggregate from the rest of the mix or the separating of the cement-water paste from the aggregate. Segregation generally indicates poor aggregate grading or mix design. Segregation may occur i...

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Storage of Cement

Storage of Cement Cement can be safely stored in sacks for a few months if kept in dry and air-right room. If prolonged storage of cement is unvoidable, it is better to empty the bags and stock the cement in as deep a heap as possible in a damp-proof enclosed space. Paper sacks a...

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Test for Freshness of Cement

Test for Freshness of Cement Indications of a damaged cement are given by the presence of large lumps of set cement, and when this happens the lumps should be screened out unless they are soft enough to be powdered when pressed in the fingers. It needs to be considered if this ce...

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Hydration of Cement & Evolution of Heat

Hydration of Cement & Evolution of Heat When water is added to cement, the cement hydrates and during the chemical reactions which take place while the cement is setting an increase in temperature occurs and a considerable quantity of heat is generated. Hydration of cement is...

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How to Patch Scratches & Small Holes in Hardwood Flooring

How to Patch Scratches & Small Holes in Hardwood Flooring Materials & Tools Needed: 1. Hammer 2. Wood Patch 3. Putty Knife 4. Sand Paper 5. Wood Restorer   Procedure on How to Patch Scratches & Small Holes in Hardwood Flooring: Step 1: For fixing small nail holes...

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How to Remove Stains in Hardwood Floors

How to Remove Stains in Hardwood Floors Materials & Tools Needed: 1. Sand paper 2. Oxalic Acid Crystals 3. Rubber gloves 4. Borax 5. Wood restorer   Procedure on How to Remove Stains in Hardwood Floors: Step 1: Remove the top hardwood floor finish of the stained area by ...

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How to Clean and Renew Hardwood Floors

How to Clean and Renew Hardwood Floors Materials & Tools Needed: 1. Vacuum Cleaner 2. Hot Water 3. Mild Detergents or Hardwood Floor Cleaning Kit (Prefer Solvent Type only) 4. Rubber Gloves 5. Scrubbing Pad 6. Soft Cloth 7. Paste Wax 8. Buffing Machine.   Procedure on Ho...

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