what is good concrete

Concrete: The Basic Mix

It is difficult to form good test specimens if it is too stiff. If it is too sloppy, water may separate (bleed) from the mixture. Remember that water is the key ingredient. Too much water results in weak concrete. Too little water results in a concrete that is ...

Is crushed concrete good base?

 · Is crushed concrete good base? Crushed concrete laid in layers is the perfect base for creating a raised garden bed. Layering crushed concrete is also a great way to create a retaining wall and control erosion on slopes or hills in your yard. Different sizes of crushed concrete can function together to help prevent erosion.

What is a Concrete Column? (with picture)

A concrete column is simply a round or square column that is made out of concrete. The size, shape, and placement of a column depends on its purpose. In some cases, concrete columns are used just for decoration, while in other cases they are integral to the construction of buildings and and other structures.

What does C20 concrete mean? – we civil engineers

 · A concrete of Grade C20 means that the concrete will have a compression resistance of 20 N/mm2 per square millimeter in 28 days. Proportion for grade C20. C20 is 1:2:4(1 part cement, 2 parts fine aggregate, and 4 parts coarse aggregate.) where as C20 ...

What Is Concrete Slump? | Hunker

Definition. Slump is a measurement of the workability or consistency of concrete. In other words, it measures how easy the concrete is to push, mold and smooth out. Accordingly, its slump rating indicates what construction application the concrete is good for. The higher the slump, the more workable the concrete.

Properties of concrete

Concrete tests can measure the "plastic" (unhydrated) properties of concrete prior to, and during placement. As these properties affect the hardened compressive strength and durability of concrete (resistance to freeze-thaw), the properties of workability (slump/flow), temperature, density and age are monitored to ensure the production and placement of ''quality'' concrete.

Different Grades of Concrete, Their Strength and Selection …

 · Grade of concrete is defined as the minimum strength the concrete must posses after 28 days of construction with proper quality control. Grade of concrete is denoted by prefixing M to the desired strength in MPa. For example, for a grade of concrete with 20 MPa strength, it will be denoted by M20, where M stands for Mix.

Graphene: what is it good for? | E&T Magazine

 · Graphene was originally identified for use as a transistor in computing, but as researchers catalogued its properties, it became clear that it could be used for many other applications. Graphene is strong, light, thin and flexible. It is the thinnest substance capable of ...

Concrete Mix Ratio and How to Mix Concrete Including a …

Mixing Concrete - Let DIY Doctor show you how to mix concrete with this Project and Video Tutorial. Explains what sand to cement ratio you need for your Concrete Project. Find out how much cement and aggregate you need to buy using our concrete calculator. A

What is Concrete Sealer? (with pictures)

 · Concrete sealer is a compound used to protect concrete from the elements. Concrete is a porous material, and without sealing, it will freely breathe. It will also absorb water, which can lead to a variety of structural and aesthetic problems. Many home supply stores carry sealers for people working on concrete projects at home, and it is also ...

What Is Shotcrete | Shotcrete & Concrete | Shotcrete …

What Is Shotcrete? Shotcrete is a kind of refined concrete drizzled by gas hose-pipe nozzle at high pressure & velocity on a projectile motion on a prepared wall surface. It is strengthened by conventional steel rods, steel mesh or fibres. It is often utilised in tunnels, underground walls, retaining walls, drainage systems & swimming pools for interim support.

What is No-Fines Concrete? Advantages and Mix …

No-Fines Concrete is a lightweight concrete made up of only coarse aggregate, cement and water by omitting fines (sand or fine aggregates) from normal concrete. Advantages, limitations and mix proportions of no-fines concrete is discussed. Very often only single sized coarse aggregate, of size passing through 20 mm retained on 10mm is used.

What Is Shotcrete | Shotcrete & Concrete | Shotcrete …

 · Concrete is a building material that comes with an exceeding diversity of choices, together with lightweight, heavyweight, porous, and fibre-reinforced, to suit a range of construction needs. It consists of refined rock -dust & water paste that solidifies. Shotcrete is a specific style of concrete that can either be dry-mix or wet-mix.

Properties of Concrete every civil engineer must know

 · A good concrete should not show less than 19N/mm 2 (5%) of compressive strength when tested with UTM after 28days. For more information about Concrete Grades can be found here Tensile strength of concrete: As discussed above, concrete is very low in ...

What is Ready Mix Concrete, its Advantages, and …

Advantages of Ready Mix Concrete: Better quality control due to various testing in the plant laboratory which is not possible on the construction site. Good for small construction projects who can not install a batching plant on the site. Can get desired concrete quality as per customer requirement. Material wastage is very low.

what is a good concrete mix Archives

 · Tag: what is a good concrete mix Concrete is Composite material Posted on May 29, 2020 July 12, 2020 by Er. Iqbal Singh Velasara It is seen that non-engineering person doesn''t differentiate between Concrete and Cement, Both Cement and Concrete are ...

Reinforced concrete

Good design and a well-chosen concrete mix will provide additional protection for many applications. Uncoated, low carbon/chromium rebar looks similar to standard carbon steel rebar due to its lack of a coating; its highly corrosion-resistant features are inherent in the steel microstructure.

What is good about concrete?

Concrete is a building material that gains strength over time. Concrete is durable - it resists weathering, erosion and natural disasters, needs few repairs and …

What are the characteristics of a good quality concrete?

 · Basic philosophy of the quality of concrete is that the concrete must be economic, sound, durable, and homogenous mixing of all ingredients and delivery on time i.e. in compliance to client requirements. Many factors are involved to maintain the quality of concrete such as: 1. 2.

10 Properties of Concrete and their Uses

 · Properties of concrete are influenced by many factors mainly due to mix proportion of cement, sand, aggregates and water. Ratio of these materials control the various concrete properties which are discussed below. Properties of Concrete Different properties of

What are the characteristics of a good quality concrete? …

 · good quailty fresh concrete 1 slup test under limits 2 temprature of fresh concrete under limit 3 good workabilty good quailty hard concrete proper surface finish pass all compressive strength test I not repeat that who has been already said. But It''s clear that you

Facts About Concrete: Why It''s So Good Yet So Bad

 · Concrete is preferred as it is cost effective and can hold up against all-weather conditions. Its superior structural reliability gives it an added advantage as it can survive even earthquakes, unlike other materials.

What are Different Tests for Concrete Quality Check?

Different quality tests on concrete such as compressive strength tests, slump tests, permeability tests etc.are used to assure the quality of the concrete that is supplied for a given specification. These quality tests on concrete give an idea about the properties of concrete such as strength, durability, air content, permeability etc. 1.

Concrete Mix Attributes, Instructions and Slumps

 · A concrete mix is like a chef''s good recipe. Concrete is composed of aggregates, Portland cement, water, and any other cementitious material or chemical admixture.Some concrete mixes will have entrapped air by using admixture or air-entraining cement.

Why Concrete Has Good Compressive Strength But Bad …

 · The reason concrete is used to support buildings and structures is that it has great compressive strength. What this means is that it''s very good at withstanding enormous amounts of weight. This remarkable compressive strength of concrete is attributed to how it''s made. It consists of numerous aggregate materials (pulverized stones) and a ...

Hard living: what does concrete do to our bodies? | …

 · Concrete causes up to 8% of global CO2 emissions; if it were a country it would be the world''s worst culprit after the US and China. It fills our rubbish …

What is Concrete Made Of? Definition & Ingredients

Concrete is made up of three basic components: water, aggregate (rock, sand, or gravel) and Portland cement. Cement, usually in powder form, acts as a binding agent when mixed with water and aggregates. This combination, or concrete mix, will be poured and harden into the …

Why Is Concrete Better?

Concrete is safe, secure and healthy for building occupants. Being an inert construction material, concrete does not burn. It also does not feed rot and mildew. It does not off-gas any volatile organic compounds and provides excellent indoor air quality. Superior quality of construction helps prevent the entry of pollen, dust and other airborne ...

What is good to clean concrete floors?

Some good cleaners include Castile soap, liquid dish detergent, stone cleaners and mild floor cleaners.Mix a solution, apply to floor with a wet mop and then rinse with a mop dipped in clean water. To make your concrete floors resistant to future stains, apply a concrete sealant.

What is Workability of Concrete? Types, Mechanism

Types, Mechanism. Workability is a property of raw or fresh concrete mixture. In simple words, workability means the ease of placement and workable concrete means the concrete which can be placed and can be compacted easily without any segregation. Workability is a vital property of concrete and related with compaction as well as strength.

Is Quikrete As Good As Concrete? | Premixed vs Traditional

Concrete gets its strength from a chemical reaction that occurs over time during curing. After it''s had time to cure, which usually take 28 days to complete, Quikrete can reach strengths up to 5000 psi. If Quikrete premixed fast setting concrete is just as good

What is Workability of Concrete?

The term workability indicates the ease or difficulty with which the concrete is handled, transported and placed. The amount of water present in concrete should be in the proper ratio. Generally, a higher water-cement ratio is required for good workability. In the actual function of water is to lubricate the concrete.

Getting Good Concrete| Concrete Construction Magazine

 · Good concrete is the result of good equipment and good decisions at every step to create the concrete that arrives on your jobsite. As a concrete contractor your thoughts are focused on what comes down the chute.

What is Precast Concrete and Why Use it? | Carlow Tanks

 · Any good concrete company will agree that using precast concrete is also a great way to speed up the building process. Blocks and other essential parts are manufactured in the factory and can be hoisted right up by crane into their correct position. This eliminates the need to take time and wait for the concrete to dry on site before work can ...

What is good quality concrete?

 · A concrete is said to be of good quality, if it is strongest, densest, most workable and most economical for the job for which it is prepared. Amount of cement used in concrete should be low and that of aggregate should be high. Click to see full …

Getting Good Concrete| Concrete Construction Magazine

Getting Good Concrete| Concrete Construction Magazine ...

What is Reinforced Concrete? Uses, Benefits, and …

 · Reinforced concrete has very good strength in tension as well as compression. This makes concrete a desired construction material. Fig. 1: Strength of Concrete 2.

What is the appropriate temperature for concrete?

Concrete can be placed any time the temperature is going to be above 40 F for 72 hours after it is placed. In some situations, it is placed even though the temperature will drop below 40 F, but special additives are usually used, and heating may b...

What is Mass Concrete-Specifications, Advantages and …

 · The concrete has very low thermal conductivity, hence the temperature at the core portion of mass concrete will be more than the surface of the concrete. The surface of the concrete is open to atmosphere. The inner core of concrete may raise its temperature to 60-degree Celcius. Therefore a huge difference in temperature will be created between ...