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Thank you for interesting in our services. We are a non-profit group that run this website to share documents. We need your help to maintenance this website. Please help us to share our service with your friends. Share Embed Donate. By definition, Plain Concrete is an artificial stone as a result of mixing cement, fine aggregates, coarse aggregates and water.

The conglomeration of these materials producing a solid mass is called plain concrete. The Ordinary Portland cement. The Rapid Hardening Portland Cement which is preferred when high early strength cc;mcr,ete is desired. The Blast Furnace or Sulfate Cement used on concrete structures designed to resist chemical attack. The Low Heat Portland Cement used for massive' sections designed to reduce the heat of hydration.

The Portland Pozzolan Cement with a low hardening characteristic concrete. The High Alumina Cement. The High Alumina Cement is sometimes called aluminous cement or cement fundu.

The alumina lime is within the limit of 0. Aside from its rapfd hardening properties, it can resist chemical attack by sulfate and weak acids including sea water. It can also withstand prolonged exposure to high temperature of more than o 1, C. This Is referred to as workability of concrete. The Main Composition of Cement 1. Workability 2. Strength 3. Durability 4. The water cement ratio is first determined at the very first Aggregates for concrete work are classified into two: j' 1.

Coarse Aggregate such as crushed stone, crushed gravel or natural gravel with particles retained on a 5 mm sieve. Fine Aggregate such as crushed stone, crushed gravel, sand or natural sand with particles passing on a 5 mm sieve. Size of Aggregates. The choice from the above sizes depends upon the dimensions of the concrete member more particularly, the spacing of the steel bars reinforcement or as specified. The cement-aggregate ratio is then chosen and established to satisfy the workability requirements.

Concrete mixtures in a paste form, is preferred than those. Fresh concrete shall be workable. That, concrete should be economically produced.

Concrete Mixture,may be classified as either: a. Designed Mixture b. Prescribed Mixture Designed Mixture. Where the contractor is responsible in establishing the mixture proportion that will achieve the required strength and workability as specified in the plan. Prescribed Mixture. Where the designing engineer specify the mixture proportion. The contractor's responsibility is only to provide a prcpert y mixed concrete containing the right proportions as pre cribed in the plan.

I Lately however, under the 51 measures, the 94 pounds per bag cement equivalent to The traditional wooden box used to measure the sand and gravel is 12 inches wide by 12 inches long and 12 inches high, having a"net volume of 1 cubiC foot. Example: Take note that all length in inches is divisible by one or any combination of these 'five numbers.

Example:, a. What IS the meter length equivalent of 7 inches? By sim- It is easier to use. A simple gUide will be adopted so that one could easily determine the equivalent values from English to Metric or vise versa. To convert Meter to Feet: Say 6.

Inches To convert Feet to Meters: Multiply by. Please fill this form, we will try to respond as soon as possible. Your name.

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Simplified Estimate by Max Fajardo


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