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 shrinkage of concrete 3. Cracks in reinforced concrete columns due to increased load on the slab 4.

Concrete 223

Concrete Foundation Materials Contract 223

The Constructor

NOVEMBER 8, 2011

Upon wetting, concrete tends to expand. These moisture-induced volume changes are a characteristic of concrete. If the shrinkage of concrete could take place without any restraint, the concrete would not crack.

Concrete 229

Concrete Foundation Contract Materials 229

The Constructor

NOVEMBER 15, 2011

Nominal Mixes In the past the specifications for concrete prescribed the proportions of cement, fine and coarse aggregates. However, due to the variability of mix ingredients the nominal concrete for a given workability varies widely in strength.

Concrete 240

Concrete Design Foundation Materials 240

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 229

Concrete Design Foundation Materials 229

The Constructor

AUGUST 10, 2012

These are the environments to which the concrete will be exposed during its working life. No Environment Exposure Conditions 1 Mild Concrete surfaces protected against weather or aggressive conditions, except those situated in coastal area. Table below shows exposure conditions of these environments.

Concrete 181

Concrete Foundation Environment Materials 181

The Constructor

MARCH 21, 2012

in dry conditions), it should be suitable for use in concrete. Aggregates: Quality of aggregates, its size, shape, texture, strength etc determines the strength of concrete. The presence of salts (chlorides and sulphates), silt and clay also reduces the strength of concrete.

Concrete 230

Concrete Materials Foundation Design 230

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. 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 240

Concrete Transportation Foundation Design 240

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.

Concrete 250

Concrete Foundation Materials Design 250

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.

Concrete 171

Concrete Foundation Materials Design 171

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. In practice, reinforced concrete beams are designed on the assumption that cracks will occur under their service loads.

Concrete 133

Concrete Foundation Materials Comparison 133

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 189

Concrete Foundation Materials Design 189

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. Water within the hardened cement paste is forced to more as a result of the applied load.

Concrete 141

Concrete Foundation Materials Contract 141

The Constructor

NOVEMBER 22, 2011

It has many advantages when compared to the normal conventional concrete. The density is considerably reduced by using fly ash based cellular lightweight concrete than normal concrete and at the same time, the strength is not affected by appropriate design mix.

Concrete 224

Concrete Foundation Materials Design 224

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. 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.

Concrete 247

Concrete Portland Foundation Materials 247

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. The individual components are prefabricated off site then taken to site where they are erected.

Concrete 143

Concrete Foundation Materials Design 143

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. Just like in-situ concrete, precast concrete can be plain, reinforced or prestressed concrete. No related posts.

Concrete 130

Concrete Foundation Materials Contract 130

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 139

Concrete Foundation Materials Contract 139

The Constructor

NOVEMBER 17, 2011

Advantages of Concrete Shells Like the arch, the curved shapes often used for concrete shells are naturally strong structures, allowing wide areas to be spanned without the use of internal supports, giving an open, unobstructed interior.

Concrete 212

Concrete Foundation Materials Design 212

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. The aggregate is more rigid than the cement paste and will therefore deform less (i.e.

Concrete 137

Concrete Foundation Materials Contract 137

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 161

Concrete Portland Foundation Materials 161

The Constructor

NOVEMBER 28, 2011

Procedure for measuring bulk density of concrete is as per IS 1199 – methods of sampling and analysis of concrete. Procedure for measuring bulk density of concrete is as per IS 1199 – methods of sampling and analysis of concrete. ii) Fill the cylindrical measure with concrete as soon as practicable after mixing.

Concrete 133

Concrete Foundation Materials Design 133

The Constructor

AUGUST 7, 2012

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

Concrete 223

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.

Concrete 122

Concrete Foundation Materials Design 122

The Constructor

AUGUST 24, 2012

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

Concrete 127

Concrete Foundation Materials Contract 127

The Constructor

MARCH 26, 2012

Hybrid concrete construction can incorporate all the benefits of precasting, (e.g. Precast and in-situ concrete can be used together in many different ways to extend the design horizons for architects, engineers and contractors. economy, flexibility, moulability, continuity and robustness).

Concrete 214

Concrete Construction Foundation Materials 214

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 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 (..)

Concrete 203

Concrete Foundation Materials Contract 203

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. Concrete is approximately 2.4 Formwork is the term used to describe this mould. This is normally made of plywood.

Concrete 223

Concrete Foundation Materials Design 223

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 (..)

Concrete 203

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.

Concrete 223

Concrete Foundation Materials Design 223

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 242

Project Management Management Concrete Foundation 242

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.

Concrete 230

Concrete Construction Foundation Materials 230

The Constructor

JANUARY 17, 2012

The complete pier segment is then used as an erection platform and launching base for all subsequent travelling formwork and concrete segment construction. Special formwork is positioned and cast-in-situ pier segment is begun. Cast-in-situ segments range between 3mm to 5m in length with formwork moving in tandem with each segment.

Construction 214

Construction Concrete Foundation Materials 214

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). (As

Concrete 218

Concrete Foundation Materials Design 218

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. Foundation near to drains where drains are running below foundation and / or drains lacking concrete cover.

Foundation 240

Foundation Concrete Construction Materials 240

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 206

Construction Concrete Foundation Design 206

The Constructor

NOVEMBER 16, 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 (..)

Residential 240

Residential Site Plans Concrete 240