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

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 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

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 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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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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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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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 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

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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GCP Applied Technologies

APRIL 3, 2018

A bonding experience: Ensuring good concrete-to-flooring adhesion. For flooring that is adhered to a concrete slab, achieving and maintaining a secure bond is essential for long flooring life and satisfactory performance. The importance of proper preparation of the concrete slab cannot be overstated. SP0035 KOVARA Blog #14.

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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

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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GCP Applied Technologies

FEBRUARY 19, 2018

What’s the Best Concrete Moisture Test Method? Flooring installers are increasingly aware of the importance of testing concrete slabs for moisture before installing their flooring. There are two main ASTM standards for testing the relative humidity (RH) of concrete slabs: ASTM F1869 - 16a and ASTM 2170. Blog-Image_#10-KOVARA.

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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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Concrete Foundation Materials Contract 127

The Constructor

AUGUST 7, 2012

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

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Concrete Foundation Maine Materials 223

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

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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Concrete Foundation Materials Contract 139

GCP Applied Technologies

FEBRUARY 19, 2018

What’s the Best Concrete Moisture Test Method? Flooring installers are increasingly aware of the importance of testing concrete slabs for moisture before installing their flooring. There are two main ASTM standards for testing the relative humidity (RH) of concrete slabs: ASTM F1869 - 16a and ASTM 2170. Phillip.fry@gc….

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Concrete Retail Education Airports 60

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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Concrete Foundation Materials Design 133

GCP Applied Technologies

APRIL 3, 2018

A bonding experience: Ensuring good concrete-to-flooring adhesion. For flooring that is adhered to a concrete slab, achieving and maintaining a secure bond is essential for long flooring life and satisfactory performance. The importance of proper preparation of the concrete slab cannot be overstated. SP0035 KOVARA Blog #14.

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Concrete Retail Security Airports 60

BD+C

JUNE 12, 2014

Constructing a concrete dome is a costly process, but this may change soon. A team from the Vienna University of Technology has developed a method that allows concrete domes to form with the use of air and steel cables instead of expensive, timber supporting structures. “[We Body Image: Blog Author: BD+C Staff.

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Concrete Airports Education Structural Engineering 49

GCP Applied Technologies

MAY 14, 2018

P2P Initiative can advance further via in-transit concrete management system. One of the National Ready Mixed Concrete Association’s (NRMCA) goals is to advance the industry away from prescriptive specifications into more versatile performance specifications†. Enter the in-transit concrete management system. Phillip.fry@gc….

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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

Posted in Category: Videos Leave a Reply Click here to cancel reply Your name (Required) Your e-mail (Your email wont be published) (Required) Your website Notify me of followup comments via e-mail About The Author This blog is authored and maintained by Gopal Mishra.

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America Concrete Foundation Airports 203

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

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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Concrete Foundation Materials Design 223

The Constructor

SEPTEMBER 10, 2012

Reply Leave a Reply Click here to cancel reply Your name (Required) Your e-mail (Your email wont be published) (Required) Your website Notify me of followup comments via e-mail About The Author This blog is authored and maintained by Gopal Mishra. He is the founder of The Constructor and works in a reputed construction company.

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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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Concrete Construction Foundation Materials 230

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.

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