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What is the definition and specifications of fair-faced concrete?

Fair faced concrete is one which after removal of form work is not required to have any further finishes on it like plastering, etc. Since concrete surface is intended to remain visible all relevant specifications of the concrete surface need to be given in the Tender. Broadly speaking these specification besides giving compressive strength, etc. of the concrete should also be dealing with desired appearance of the concrete. As in all works, they should also specify tolerance limits of defects or blemishes for fair faced concrete. Generally blemishes associated with Fair faced concrete are Blowholes, Steps, Fins, Colour variation, etc. For details and better understanding you may refer to 'Guide to Off form concrete finishes' published by Cement Concrete and Aggregates Australia' Though in India we do not follow it I found it interesting and quite in detail.


What grade of concrete will result in a mix of 3 2 1?

Mixing concrete is a basic skill that all DIY enthusiasts should know how to do. Concrete is one of the most common and inexpensive construction materials on the planet being comprised mostly of sand, gravel and cement. Mixing concrete is similar to baking in that to achieve consistent results it is best to follow a specific recipe. There are a multitude of different concrete mixes for different applications depending on the strength, workability and application for the concrete. Mixing concrete is very much a science for professionals, but to the average backyard enthusiast, learning the basics of concrete is enough to get you started. When mixing concrete you will need to mix aggregates such as sand and gravel along with cement powder and water as a catalyst to begin the chemical process of bonding the ingredients together. Mixing concrete is a function of proportions where you will measure the volume of aggregate used to the volume of cement used. The most common concrete mix used worldwide is the 3-2-1 mix which uses three parts gravel, two parts sand and one part cement. Water is added with the idea that you should use as little water as possible to make the concrete workable for what you need it for. Concrete viscosity is measured by "slump" which refers to a specific test where the amount that a cone filed with concrete will lose its shape once the cone is removed is measured in inches or mm. A concrete with zero slump would be very rigid and dry and inclined to hold its shape, where a concrete with a slump of six inches or more would be extremely wet and not inclined to hold a shape. The 3-2-1 mix is so widely used since you can fill large areas with concrete for relatively cheap. You could potentially use only sand and cement, no gravel, to create what is called mortar. In the 3-2-1 mix the gravel serves as a filler taking up a great deal of space while retaining a relatively high overall strength. The disadvantage of the 3-2-1 mix is that the larger gravel aggregate will often float to the surface during finishing, and is unsuitable for thin or detailed concrete applications. The best overall mix for a DIY enthusiast to memorize and use is a simple 3:1 mortar mix. By using three parts sand and one part mortar you can create the strongest concrete possible as well as concrete that is easy to finish and detail with designs, templates or stamps. By not using the gravel the mortar will have a smoother overall consistency, but will ultimately occupy less volume than concrete made using gravel as well. If you are pouring very large volumes of concrete the gravel could prove to be cost effective however for most DIY projects a 3:1 mortar mix is the way to go. The sand that you need to use for a 3:1 mortar mix should be sharp sand, or masonry sand or jointing sand. Each place that you purchase sand will use a different term so it can be confusing when shopping. All that you need to remember is to avoid play sand. Play sand is sand that has been washed and sterilized (this is ok) and then tumbled to soften all the edges of the individual sand grains (this is bad). The sharp edges of the sand help to hold together the concrete mix better than the rounded edges of the tumbled sand. Ideally you would like to find sand from landscape supply stores which will sell to you by the cubic yard. With a strong trailer you can pick up as much sand as you could possibly need for next to nothing - plus the quality of the sand for making cement will be very high. The applications for a DIY enthusiast to use a 3:1 mortar mix are huge. Everything from fixing broken outdoor steps and stairs, driveways, patios, decks, ponds, waterfalls, artificial rock, statues and much more is possible with a simple mix of sand, cement and water. Start with small concrete projects to get a better feel and understanding for how to work with concrete. Since concrete is so popular world wide, and is a highly advanced science, you will never run out of interesting concrete applications to learn about or try. Combined with being the most affordable construction material on the planet and readily available everywhere - learning to mix basic concrete recipes is a fundamental DIY project. Canadian author and second generation swimming pool expert Steve Goodale has an extensive tutorial series and online following for his instructional information on artificial rock and swimming pool construction and repair.


What does dnit stands for in construction tenders?

DNIT stands for DETAIL NOTICE INVITING TENDER(DNIT)


What size laminated timber beam is needed for a 23 foot clear span under a 15 foot roof in between load bearing walls?

38 feet longIt is not possible to give a definite answer without more detail. The construction and type of roof will determine the load (weight) bearing on the beam, and factors such as wind load and earthquake load, and the way the roof bears on the beam (truss/point load/distributed load) will all affect the sizing.


What is Variation in construction?

A variation in a construction contract is a change from what is currently contracted to be built, supplied or fitted to a different build, supply or fit. Variations are written instructions from the client to a contractor or from a main contractor to a sub contractor. The instruction will set out the details of the change so that all parties are agreed on the new construction details. Typically, a variation is used to clarify a detail that could not be fully defined at the start of the contract - Paints, wall coverings, carpets are examples of such details that are often left to the end of the contract to decide. They can be used when unexpected issues arise during the contract. They are often used simply because the client changes his mind during a contract. The final contract is often modified by hundreds or even thousands of variations that each reflect a change in the way the building contract is to run.

Related Questions

How to write expository writing?

You must do it in this order: Concrete Detail, Concrete Detail, Commentary.


Which phrase is an example of a concrete detail in Li-Young Lee's "From Blossoms"?

From laden boughs, from hands


Is there a typical detail showing liner attachment to concrete?

no there is no typical detail showing liner attachment to concrete You can actually go to Youtube and find how to videos on this exact job task.


Which revision includes new sensory detail Arnold heard the news.?

arnold heard the news through the scratchy old radio


Why should a writer use concrete details and examples?

Using concrete details and examples helps to make writing more vivid and engaging for readers. It also provides clarity and specificity, making the writing more persuasive and effective in conveying the writer's message. Concrete details and examples help to bring a narrative to life and make abstract concepts more tangible and relatable.


What is the difference between a detail and a example?

when describing a word, a detail is something more presice about it, something that is not general but specific; an example is the ordinary use of the word. You can tell a story in detail and it will probably be long with every small action described. when you give a definition of a word you can give an example for another person to understand better. EXAMPLE: an example of detail could be: the desk was made of wood, painted in blue and barnished.- that is a detail description of a desk. I just gave you an example of a detail


What is the definition of Concrete Detail in the subject writing?

Concrete detail in subject writing simply means avoiding generalities so that a reader can better visualize or understand your meaning. This is term is better understood with an example. Rather than saying, "The man was asleep when I arrived at the hotel" one could add definitive detail to your description, ie "The old man was slumped over the counter, his chest heaving softly, his hands still holding his pencil and crossword section of the paper, which was now dangling over the front desk like Christmas garland." A statement like this one adds specific detail to an observation, making it much easier for the reader to visualize.


Which revision includes the most sensory detail?

The revision that includes vivid descriptions of sights, sounds, smells, tastes, and textures in a way that engages the reader's senses the most.


How do check that the documents are currents and valid?

Some documents have regular revisions and so it is important to check the dates and revision numbers to ensure you are using the latest and correct revision. Some documents have expiry dates and observation to this detail may be critical, ie: legal regulation paperwork.


What is a factual detail?

A factual detail is a specific piece of information that can be validated or proven to be true. It is a detail that is based on concrete evidence or data, often used to support an argument or conclusion.


Can you give an example of a sentence using the word detail?

I explained the gorgeous view down to the smallest detail.


Checking and rechecking work for mistakes is an example of?

paying attention to detail. *APEX HOMIE*