The Constructor

JANUARY 1, 2012

The benefits of using steel fibres in concrete are as follows: 1. Steel Fibres are generally distributed throughout a given cross section whereas reinforcing bars or wires are placed only where required 2. Steel fibres are relatively short and closely spaced as compared with countinuous reinforcing bars of wires.

Concrete 244

Concrete Foundation Materials Design 244

The Constructor

NOVEMBER 8, 2011

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 attack 5.

Concrete 235

Concrete Foundation Materials Contract 235

The Constructor

MARCH 25, 2012

There is no grout loss, such as that from badly fitting formwork, which results in poor quality concrete like shown below. By careful selection of materials and finishing processes, a wide range of high quality finishes can be obtained.

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Concrete Foundation Materials Design 229

The Constructor

NOVEMBER 15, 2011

Nominal Mixes In the past the specifications for concrete prescribed the proportions of cement, fine and coarse aggregates. Nominal Mixes In the past the specifications for concrete prescribed the proportions of cement, fine and coarse aggregates.

Concrete 240

Concrete Design Foundation Materials 240

The Constructor

AUGUST 10, 2012

These are the environments to which the concrete will be exposed during its working life. These are: Mild exposure Moderate exposure Severe exposure Very severe exposure, and Extreme exposure. The durability requirement, like clear cover to reinforcement steel is governed by these exposure conditions.

Concrete 230

Concrete Foundation Environment Materials 230

The Constructor

NOVEMBER 25, 2011

WHY WE TEST CONCRETE SRTRENGTH AFTER 28 DAYS? WHY WE TEST CONCRETE SRTRENGTH AFTER 28 DAYS? Tweet Why do we test concrete compressive strength after 28 days? The table below shows the compressive strength gained by concrete after 1, 3, 7, 14 and 28 days with respect to the grade of concrete we use.

Concrete 250

Concrete Foundation Materials Design 250

The Constructor

MARCH 23, 2012

There are two ways of overcoming this problem: Embed another material in the concrete which is strong in tension – reinforced concrete Remove the tension altogether – by arching or prestressing.

Concrete 200

Concrete Foundation Materials Comparison 200

The Constructor

NOVEMBER 28, 2011

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.

Concrete 240

Concrete Transportation Foundation Design 240

The Constructor

NOVEMBER 22, 2011

It has many advantages when compared to the normal conventional concrete. Fly ash is considered as one of the waste industrial product that cannot be easily disposed. It solves the problem of disposal of flyash and at the same time it reduces the cost of the construction.

Concrete 244

Concrete Foundation Materials Design 244

The Constructor

NOVEMBER 20, 2011

The concrete shall be deemed to comply with the strength requirements if: a) every sample has a test strength not less than the characteristic value;or b) The strength of one or more samples though less than the characteristic value, is in each case not less than the greater of : 1) The characteristic strength minus 1.35

Concrete 230

Concrete Design Foundation Materials 230

The Constructor

MARCH 25, 2012

The following figures illustrate the precast concrete process: 1. The individual components are prefabricated off site then taken to site where they are erected.

Concrete 210

Concrete Foundation Materials Design 210

The Constructor

MARCH 22, 2012

Following are the cases, which affect creep in concrete: When the aggregate volume is increased, creep will be less as the aggregate is more rigid than the cement paste. Creep can continue over a long period of time (more than 30 years in some cases) after the application of the load.

Concrete 203

Concrete Foundation Materials Contract 203

The Constructor

MARCH 21, 2012

in dry conditions), it should be suitable for use in concrete. Quality of Raw Materials: Cement: Provided the cement conforms with the appropriate standard and it has been stored correctly (i.e.

Concrete 230

Concrete Materials Foundation Design 230

The Constructor

MARCH 20, 2012

Cleanliness: when repairing concrete, care must be taken to remove any dirt or dust that will prevent the repair concrete bonding with the parent concrete. Correct technique : The correct technique and the correct tools are essential for repairing damaged concrete.

Concrete 247

Concrete Portland Foundation Materials 247

The Constructor

MARCH 25, 2012

WHAT IS PRECAST CONCRETE? Tweet Precast concrete is cast under factory controlled conditions and not erected on site until it is fully hardened. Tweet Precast concrete is cast under factory controlled conditions and not erected on site until it is fully hardened.

Concrete 198

Concrete Foundation Materials Contract 198

The Constructor

NOVEMBER 17, 2011

The shells are most commonly flat plates and domes , but may also take the form of ellipsoids or cylindrical sections, or some combination thereof.

Concrete 230

Concrete Foundation Materials Design 230

The Constructor

AUGUST 18, 2012

Related posts: SELF COMPACTING CONCRETE WITH TESTS TESTS ON HARDENED CONCRETE CHEMICAL TESTS ON CONCRETE STRUCTURES COMMON TESTS ON THE FRESH CONCRETE Removing concrete slab to build wood deck but worried about water entering basement? Tweet Loading GET LATEST TOPICS IN YOUR EMAIL- SUBSCRIBE NOW.

Concrete 207

Concrete Foundation Materials Contract 207

The Constructor

NOVEMBER 28, 2011

Procedure for measuring bulk density of concrete is as per IS 1199 – methods of sampling and analysis of concrete. The steps are as follows: i)Take freshly mixed concrete from transit mixer by using wheel borrow. ii) Fill the cylindrical measure with concrete as soon as practicable after mixing.

Concrete 200

Concrete Foundation Materials Design 200

The Constructor

DECEMBER 17, 2011

It is new technique involved in the civil engineering.Reactive powder concrete in made by replacing the conventional sand and aggregate by grounded quartz less than300 micron size, silica fume, synthesized precipitated silica ,steel fibers about 1 cm in length and 180 micron in diameter.

Concrete 214

Concrete Portland Foundation Materials 214

The Constructor

AUGUST 7, 2012

Tweet Loading GET LATEST TOPICS IN YOUR EMAIL- SUBSCRIBE NOW.

Concrete 223

Concrete Foundation Maine Materials 223

The Constructor

JANUARY 22, 2012

The stress strain curve of concrete lies between those of the aggregate and the cement paste. The aggregate is more rigid than the cement paste and will therefore deform less (i.e. have a lower strain) under the same applied stress. However this relationship is non-linear over the most of the range.

Concrete 202

Concrete Foundation Materials Contract 202

The Constructor

AUGUST 7, 2012

They may be load bearing, or they may be just decorative to act as a façade. The techniques that are used in the manufacture of panels permit a variety of finishes that imitate virtually any type of architecture at a fraction of the cost.

Concrete 203

Concrete Construction Foundation Materials 203

The Constructor

NOVEMBER 21, 2011

Both the rate and degree of hydration, and the resulting strength of the final concrete, depend on the curing process that follows placing and consolidating the plastic concrete. This reaction, called hydration, produces a stone-like substance—the hardened cement paste.

Concrete 190

Concrete Foundation Materials Design 190

The Constructor

NOVEMBER 21, 2011

The concrete can be specified in two ways : a) by proportioning of the constituents /ingredients (nominal mix) b) by required strength (Design mix) Concrete is mixed by any two methods, based on requirement as per quality and quantity of concrete required.

Concrete 188

Concrete Foundation Materials Design 188

The Constructor

AUGUST 24, 2012

Related posts: WHAT IS PRECAST CONCRETE? Tweet Loading GET LATEST TOPICS IN YOUR EMAIL- SUBSCRIBE NOW.

Concrete 178

Concrete Foundation Materials Contract 178

The Constructor

NOVEMBER 16, 2011

Residential house site should be located away from the busy commercial roads. Good foundation soil should be available at responsible depth. This aspect saves quite a bit in the cost of the building. Residential site should not be located near workshops, factories, because such locations are subjected to continuous noise.

Residential 240

Residential Site Plans Concrete 240

The Constructor

MARCH 19, 2012

When concrete is fresh and in its liquid state it must be restrained within a mould in order for it to set in its required shape. A smooth outer surface provides the main support for the concrete as it sets. Formwork is the term used to describe this mould. For most in-situ pours, the formwork is made of wood.

Concrete 223

Concrete Foundation Materials Design 223

The Constructor

NOVEMBER 15, 2011

Home News Videos Tips Building Building Bye Laws Building Materials Aggregates Cement Wood Building Tips Buildings Green Buildings Flooring Formwork/Shuttering Paints & Decoratives Skyscrappers Smart Materials Concrete Concrete Admixtures Concrete Cracks Crack Repair Concrete Durability Concrete Properties Concrete Types Fibre reinforced Fire Proof (..)

Construction 247

Construction Concrete Foundation Materials 247

The Constructor

MARCH 23, 2012

Codes of practice impose limits on horizontal movement or sway.

Concrete 240

Concrete Foundation Structural Engineering Materials 240

The Constructor

NOVEMBER 27, 2011

hardened concrete). hardened concrete). hardened concrete). hardened concrete). hardened concrete). hardened concrete). Procedure as per IS 516 – Methods of tests for strength of concrete 1.

Concrete 223

Concrete Foundation Materials Design 223

The Constructor

MARCH 27, 2012

Precast floor slabs: The main types of slabs are used in the precast frames are: Hollow cored slab Double tee slab Precast walls: Precast concrete walls serve two functions: Stability As walls or boxes surrounding staircases and lift shafts. Corner columns – not symmetrical at all.

Concrete 240

Concrete Foundation Materials Design 240

The Constructor

NOVEMBER 27, 2011

This method is also used to find out 28 days compressive strength of concrete in 28 hours. (As As per IS 9013-1978-Method of making, curing and determining compressive strength of accelerated cured concrete test specimens).

Concrete 230

Concrete Foundation Materials Design 230

The Constructor

NOVEMBER 1, 2011

Sulphate attack in concrete foundation and cement mortar below ground level. Movement in walls above ground level and expansion and deterioration of cement mortar and concrete below ground level. Cracking in walls in line of weakness in structure. Clayey soil with high sulphate content. Inadequate support to foundation from land-fill.

Foundation 240

Foundation Concrete Construction Materials 240

The Constructor

MARCH 17, 2012

Prestressed Concrete Piles CLASSIFICATION OF PILES LOAD ON PILES NEGATIVE SKIN FRICTION ON PILES Can foundation Piles be welded, if yes what is the welding procedure to be followed? Tweet Loading GET LATEST TOPICS IN YOUR EMAIL- SUBSCRIBE NOW. Related posts: Advantages of Precast pile foundation over Cast-in-situ pile foundations?

Concrete 230

Concrete Foundation Materials Engineering 230

The Constructor

NOVEMBER 11, 2011

Home News Videos Tips Building Building Bye Laws Building Materials Aggregates Cement Wood Building Tips Buildings Green Buildings Flooring Formwork/Shuttering Paints & Decoratives Skyscrappers Smart Materials Concrete Concrete Admixtures Concrete Cracks Crack Repair Concrete Durability Concrete Properties Concrete Types Fibre reinforced Fire Proof (..)

America 203

America Concrete Foundation Airports 203

The Constructor

JANUARY 17, 2012

Home News Videos Tips Building Building Bye Laws Building Materials Aggregates Cement Wood Building Tips Buildings Green Buildings Flooring Formwork/Shuttering Paints & Decoratives Skyscrappers Smart Materials Concrete Concrete Admixtures Concrete Cracks Crack Repair Concrete Durability Concrete Properties Concrete Types Fibre reinforced Fire Proof (..)

Construction 230

Construction Concrete Foundation Design 230

The Constructor

SEPTEMBER 10, 2012

Home News Videos Tips Building Building Bye Laws Building Materials Aggregates Cement Wood Building Tips Buildings Green Buildings Flooring Formwork/Shuttering Paints & Decoratives Skyscrappers Smart Materials Concrete Concrete Admixtures Concrete Cracks Crack Repair Concrete Durability Concrete Properties Concrete Types Fibre reinforced Fire Proof (..)

Project Management 244

Project Management Management Concrete Foundation 244