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.

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The Constructor

NOVEMBER 8, 2011

This type of shrinkage is caused by the loss of moisture from the cement paste constituent, which can shrink by as much as 1% per unit length. Unfortunately, aggregate provides internal restraint that reduces the magnitude of this volume change to about 0.05%.

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Construction Cost Estimating

NOVEMBER 24, 2016

This construction video provides detailed methods for estimating the quantity of cement, sand and aggregate in cement concrete to figure out the cost of all the materials. In this video, the volume of PCC to be prepared is taken as 10 cubic meter that is to be completed with M15 grade of concrete in the ratio of 1:2:4.

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The Constructor

NOVEMBER 15, 2011

Nominal Mixes In the past the specifications for concrete prescribed the proportions of cement, fine and coarse aggregates. These mixes of fixed cement-aggregate ratio which ensures adequate strength are termed nominal mixes. These offer simplicity and under normal circumstances, have a margin of strength above that specified.

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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.

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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

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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.

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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.

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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.

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CivilJungle

APRIL 26, 2020

What Is Concrete? Concrete is the final product resulting from mixing cement , aggregates (including sand), water, and mixtures. The first use of concrete was by the Roman Empire. The Pantheon is the largest unreinforced concrete dome in the world, built-in 120 A.D. Different Types of Concrete. Dry lean Concrete.

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The Constructor

NOVEMBER 25, 2011

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.

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The Constructor

MARCH 20, 2012

From the diagram above, we can see how the process unfolds. When the binding has set, the steel bars are placed into position.

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Civil Lead

APRIL 2, 2020

What is Prestressed Concrete? Concrete can withstand a great amount of compressive stress but it has a very low tensile strength. Because of low tensile strength, concrete gets cracks when subjected to maximum load. Why prestressed concrete is used? When water comes in contact with these cracks the steel gets corroded.

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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.

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Concrete Foundation Materials Comparison 133

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.

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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.

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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.

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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.

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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.

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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.

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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. Expediency: The longer the repair is left, the more work has to be done, and the less likely that the repair will blend in.

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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.

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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.

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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.

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The Constructor

AUGUST 24, 2012

Cladding panels behave like wall panels and are therefore subjected to the same forces, i.e. axial compression, horizontal flexure due to wind, and in-plane and out-of-plane shear.

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The Constructor

AUGUST 7, 2012

This allows a greater performance from the cladding panel than simple building enclosure.

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The Constructor

AUGUST 18, 2012

The initial setting time should not be less than 1 hour and to be within 25% of the result with distilled water.

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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.

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The Constructor

NOVEMBER 28, 2011

Procedure for measuring bulk density of concrete is as per IS 1199 – methods of sampling and analysis of concrete.

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GCP Applied Technologies

JUNE 1, 2018

Monitoring mix design performance with an in-transit concrete management system. Ready mix concrete producers can optimize fleet processes and avoid overdesign—adding extra cement to the mix—by way of an in-transit concrete management system , which is installed on every ready-mix truck. michael.delros…. Fri, 06/01/2018 - 14:37.

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Concrete Management Design Environment 60

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 (..)

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America Concrete Foundation Airports 203

The Constructor

SEPTEMBER 10, 2012

Organizing projects means defining roles and responsibilities, create a project charter, and develop high-level time and cost estimates. In this process you identify the business need for and objectives of the project; clarify competing demands and watch for scope creep.

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The Constructor

JANUARY 14, 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 (..)

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The Constructor

MARCH 26, 2012

Hybrid concrete construction can incorporate all the benefits of precasting, (e.g. The different materials are used according to their strengths and weaknesses to provide simple, buildable and competitive high-quality structures that offer consistent performance. economy, flexibility, moulability, continuity and robustness).

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The Constructor

JANUARY 14, 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 (..)

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Concrete Foundation Materials Contract 203

The Constructor

APRIL 2, 2012

This tie prevents the beam and the slab separating during the in-situ concrete screeding operation. Finally, in-situ concrete is poured. First, a rubber bearing is placed at the support point. When the slab is in position, a welded connection is made. Reinforcement is placed onto the top of the slab.

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The Constructor

MARCH 27, 2012

More efficiently, they can act compositely with the in-situ concrete. Indeed some beams, particularly in seismic areas are designed to act both compositely and non-compositely in the same span. Non-Composite Permanent Formwork: Non-composite precast permanent formwork is used to speed the erection process and assure quality finish.

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