What Materials Can Be Added to Concrete to Make It Stronger?

Mastour ReadyMix is one of the largest concrete manufacturing companies located in the Kingdom of Saudi Arabia with ready mix concrete and cement plants in Jedda saudi Arabia, Khamis Mushayt Saudi Arabia, Abha Saudi Arabia, Dammam Saudi Arabia,

Concrete is often a strong enough product on its own. However, the material does crack under too much pressure. Similarly, concrete can crack under the wrong kind of pressure. Concrete is known to withstand compression, but it bends or cracks under tension weight. To make the concrete stronger and last longer under tension, companies add materials to the concrete during various stages of the process.

Nano-concrete

Molecular materials are poured into the concrete to add strength while the concrete is being mixed. Some of the nano-concrete mixtures are comprised of polyethylene or ethylene particles such as being developed by The Massachusetts Institute of Technology. Other nano-concrete, like that developed by the University of Florida, use the silicates from finely ground clay. According to MIT’s “Technology Review Magazine,” nano-molecules work their way into the microscopic holes found in the cement. As a concrete slab is poured, the nano-molecules inside the holes make it harder for salt and other contaminants to enter the holes and cause the concrete to break.

Post Tensioning (Rebar or Cable)

Another way to strengthen concrete is to incorporate steel into the mix. This is not done using fine particles. Instead, the concrete is poured over steel bars or cables that are woven into a mesh. The mesh is completely encapsulated into the concrete. The steel adds reinforcement to the concrete, providing extra help in handling tension. The concrete slabs made in this manner are called post tensioning slabs.

Fiber Reinforcement

Fibers applied to the concrete during the mixing stage are yet another strengthener. Steel, polypropylene and other polymers are mixed into the concrete to reinforce it after drying. The fibers help absorb the tension that leads to cracking, adding to the durability of the concrete.

Availability

Not all of these concrete mixes or their additions are available for purchase at your local hardware. Nano-concrete is not available until the product has undergone further testing. Post tensioning is a technique that has been used for quite some time, however. You can purchase steel rebar and cable materials at any large hardware store. The fiber additives are also available as well as concrete pre-mixed with fibers. You can find these with retailers who specialize in concrete.

Concrete as Construction Materials

Mastour ReadyMix is a Ready mix Concrete, cement and related construction materials and services company Jeddah Saudi Arabia

Concrete is the most widely used man made construction material in the world, and is second only water as the most utilized substance on planet. It is obtained by mixing cementitious materials, water and aggregates (and sometimes admixtures) in required proportions. The mixture when placed in forms and allowed to cure, hardens into a rock-like mass know as concrete. The hardening is caused by chemical reaction between water and cement and it continues for a long time, and consequently concrete grows stronger with age. The hardened concrete may also be considered  as an artificial stone in which the voids of larger particles (coarse aggregate) are filled by the smaller particles ( fine aggregate) and the voids of fine aggregate are filled with cement. In a concrete mix the cementitious material and water form a paste called cement-water paste which in addition to filling the voids of fine aggregates , coast the surface of fine and coarse aggregates and binds them together as it cures, thereby cementing the particles of the aggregates together in a compact mass.

The strength, durability and other characteristics of concrete depend upon the properties of its ingredients, on proportion of mix, the method of compaction and other control during placing, compaction and curing. The popularity of concrete is due to the fact that from the common ingredients, it is possible to tailor the properties of concrete to meet demands of any particular situation. The advance in concrete technology  have paved the way  to make the best use of local availability materials by judicious mix proportioning and proper workmanship, so as the produce concrete satisfying performance requirement.

The key to producing a strong , durable and uniform concrete, i.e. high performance concrete  lies in the careful control of its basic and process components .

Why is the Amount of Water so Important for Concrete?

Mastour ReadyMix is a Ready mix concrete and cement products company Jeddah, Khamis Mushyat, Dammam, Abaha Kingdom of Saudi Arabia

An important item to understand in concrete work is the water-cement ratio. A minimum amount of water, approximately 25% of the weight of the cement, must be included to chemically hydrate the concrete batch. In the actual mixing process, though, it takes about 35% to 40% water to work through the mixing process, get to the actual cement, and cause effective hydration.

In practice, though, much more water gets added to increase the workability of the concrete. So why does it matter if there is lots of water in the concrete mix? Any water above the theoretical ideal of 25% doesn’t get used in the chemical hydration process. Therefore, the excess water remains in the concrete while the concrete cures. Over time, this excess water evaporates out of the concrete and voids remain. These voids weaken the concrete, causing less strength and more cracking.

The water-cement ratio matters to the engineer, but why does the Construction Supervisor care? Anyone who has placed concrete knows how much easier a flowing, more liquid concrete is to place than a drier concrete. There is a tendency to add water to the mix, as it is ready to be placed, to make the concrete flow better. In fact, if the concrete doesn’t flow well, it may not properly surround the rebar (causing a poor bond with the rebar) or it may not flow properly against the forms (causing voids and areas needing patching). Insert photo.

So, a conflict often exists on the jobsite:

1. Add water to the concrete mix to make it flow better, but weaken the quality of the concrete (both strength and crack resistance)

or

2. Don’t add water to the concrete mix to keep the proper water-cement ratio but work harder to place the concrete and possibly have significant voids.

The easy answer is never add water on the site to concrete, but that answer ignores the reality of the placement dilemma. This is often a complicated decision, with Structural Engineers, Building Officials, Specifications, Concrete Foreman and others all having input. It’s important the Construction Supervisor at least be aware of this issue for every concrete placement and understand how the decision to add water will be handled.

Basics of Concrete

Mastour Ready Mix is one of the major companies operating in the field of construction and reconstruction depends in its work

Concrete is made up of five primary constituents.

• Water
• Cement
• Air
• Fine Aggregate (FA)
• Coarse Aggregate (CA)

The water and cement form a paste, which binds the aggregate into a rock-like mass as the water and cement combine through a chemical reaction called hydration. The paste also includes entrapped air introduced by mechanical mixing and entrained air introduced by the addition of chemical admixtures. The paste constitutes between 25 and 40 percent of the volume. The aggregate makes up the remaining 60 to 75 percent. Air in concrete varies from about ½ to 2 percent in non-air-entrained concrete to about 4 to 8 percent entrained air in concrete containing air-entraining admixtures.
FA, sometimes called “sand”, is composed of particles that pass the 4.75 mm (No.4) sieve. CA, or gravel, consists of particles retained on or above 4.75 mm (No.4) sieve. Well-graded aggregate, consisting of a wide range of FA and CA sizes, provides for efficient use of the water/cement paste. Since aggregate makes up most of the mix volume, it should consist of particles with adequate strength and resistance to exposure conditions.
Concrete
Concrete is a construction material that consists, in its most common form, of Portland cement, aggregate (generally gravel and sand) and water.
Concrete solidifies and hardens after mixing and placement due to a chemical process known as hydration. The water reacts with the cement, which hardens, bonding the other components together and eventually creating a stone-like material.
Concrete is used more than any other man made material on the planet. It is used to make pavements, architectural structures, foundations, motorways/roads, overpasses, parking structures, brick/block walls and footings for gates, fences, and poles.
Concrete powers over a $35 billion industry which employs over two million workers in the United States alone. Over 55,000 miles of freeways and highways in America are made of this material. The People’s Republic of China currently consumes approximately 40% of world cement production.

The vulnerability of porous concrete

Mastour Ready Mix provides its customers with high-quality branded cement products for their construction needs

Though it is believed that porous concrete to protect not need all the same should pay attention to the presence of a set of tiny cavities, making it vulnerable to external factors (wind, water). Therefore, additional protection such as plastering, tiling, painting – cannot hurt. And facing materials offered today by various construction companies, encouraged by a wide selection. However, each material has its pluses and minuses. Aerated concrete – lightweight material with a lot of advantages. But we should remember that in no case be obkladyvat wall of aerated concrete bricks on the front side. This is one of his weaknesses.
WARNING: brickwork, laid up against the cellular-concrete wall, will reflect the resulting vapor in the house and send it back to the room that faces the consequence of an increase in moisture content and the appearance syrostnyh phenomena on the walls of the house.
CONCLUSION: Pay close attention to the selection of materials and use them exactly as prescribed.

Concrete: To determine the name

At Mastou Ready Mix, we understand that our product, concrete, is one of the most unique and versatile building materials in the Saudi Arabia.

Building full of questions. When are you going to buy a faucet at once confronted with the questions: “What a crane to buy, and where?” “Is not it better to buy a faucet?” When it comes to concrete, issues no less. Many people do not quite clearly understand what is the difference between an aerated concrete, foam and aerated concrete. Just do not understand their accompanying values “autoclave” and” “non-autoclaved concrete. So what, five of these titles represent a whole, or each exist separately? Answer, for starters, on this issue. Overriding and fundamental in this series is a cellular concrete. Under aerated concrete involve materials for which a single, the same composition (having equidistant cells, strengthening of physical and mechanical properties of concrete). Due to the porosity of the material is much reduced, its density and weight. These enhanced qualities distinguish the concrete from the resulting product, produced from the usual mixture of sand, water and cement. By the term “cellular concrete” is often added the definition of “light”. Lightweight cellular concrete is divided into two types: foam and aerated concrete. The difference is in the process of production. Hence, too, came the concept of autoclave and non-autoclave. Autoclaved aerated – aerated and non-autoclaved aerated – this is aerated concrete.

Crushed stone and gravel of solid rocks

After many years’ research, Mastour company has developed an advanced vertical shaft impact crusher, which can be used together with other machinery as a complete sand making flow. This design racks a leading role in the same industry

Fields of mining granite and other dense rock myriad of the former Soviet space. Those who are still not closed, or just under construction, capable of supplying companies for the production of building materials for many years. One of the most essential elements for building work can be considered as crushed stone and gravel of solid rocks.
Based on the fact that there are standards for road metal and gravel, rocks, those instances that have a relative density of the particles from 2 to 3 grams per cubic centimeter, are used exclusively as a filler for concrete mixtures and as material for road and other works building character. What concerns rubble and gravel, which does not apply the standard, its application is limited to use as ballast for railway tracks and of course, as a decorative gravel.
Granite rubble, as well as other rocks, starting with mine explosions solid granite slabs. After that huge chunks of granite transported to the crushing plant, where with the help of special equipment all parts and sorted into fractions. Thus, the smallest fraction of a granite screenings, which is used exclusively for decorative purposes. All subsequent fractions used in the manufacture and filling of building materials. The largest is usually used very rarely. Their use is limited to decorative features, such as decorating the fountains, pools and artificial lakes.
Before the rubble and gravel get into the building materials, conducted a series of studies, which determine the structure of rocks, their strength, flakiness, frost resistance, bulk density, and of course radionuclide diagnosis to identify the class of ionizing radiation. Only after all results are known, rubble and gravel can be sorted by application. To date, rubble and gravel can be bought in DIY stores, or directly at the mining complex.