PowerPoint Presentation

[Audio] Good day everyone! Welcome to our presentation on concrete construction estimation. In this presentation we will be discussing the different types of concrete, the principles of mixing, the units of measure used, and the conversion from inches to meters. We hope you find the information helpful!.

[Audio] Concrete is a composite material composed of cement, fine aggregates, course aggregates, and water. Reinforcement can be added to a plain concrete mixture to obtain reinforced concrete, depending on the material used and the desired strength of the concrete. In construction, three different types of concrete can be used: ordinary Portland cement, rapid-hardening Portland cement and blast furnace or sulfate cement, each being used based on the purpose and requirements of the build..

[Audio] We will be looking at the types of Aggregates used in construction. Course Aggregates generally consist of crushed stone, crushed gravel, or natural gravel with particles that remain on a 5.0 mm sieve. Fine Aggregates usually contain crushed stone, crushed gravel, sand, or natural sand with particles that pass through a 5.0 mm sieve. By comprehending the distinction between Course and Fine Aggregates, we can gain a better knowledge of the various construction materials that are needed..

[Audio] In order to achieve the desired strength and quality of the concrete for your project, American Concrete Institute (ACI) suggests that there must be various trial and adjustments processes until an established proportion is established. The components that should be taken into consideration are cement, water-cement ratio, air-entrainment, coarse aggregate, fine aggregate, aggregate-cement ratio, and admixture. All these must be carefully considered in order to produce a concrete mixture suited for your project..

[Audio] The topic of discussion is concrete simplified construction estimate by Max Fajardo. There are two types of concrete mixtures - designed mixtures and prescribed mixtures. The contractor is responsible for the proportions of designed mixtures to meet the required strength and workability stated in the plan. The designing engineer is responsible for specifying the proportions of prescribed mixtures. Before System International, materials for concrete structures were measured in cubic meters with components such as cement, sand, gravel, and water measured in pounds, cubic foot, and gallons per bag..

[Audio] The slide presents a table that shows the conversion from inches to meters. This table provides a straightforward way to estimate construction projects and is clearly laid out by authors Max Fajardo, Ancla, Krista Marie, Dajonan, Marianne, and Ravelo, Sarah Lyn. It can be used as a reference to save time and effort in the construction process..

[Audio] Concrete proportions can also be calculated by either weight or volume method. Tables like this one, where the data is already presented, can be used as a guide. It is important to note that mixing proportions must be carefully considered before use. The cement content must be determined based on the desired strength of the concrete mix, and the sand and gravel ratio must also be taken into account in achieving the desired proportion. Mixing concrete that doesn’t adhere to the appropriate proportion can cause premature deterioration of the concrete mix." Concrete simplification is key when it comes to accurate construction estimates. Different concrete mixtures must be carefully observed to provide the most effective form of mixture for a given application. The data provided in Table 1-2 is a guide for proportioning concrete mixtures by weight and volume. It is important to note that the cement content should be determined by the desired strength of the concrete mix, and the amount of sand and gravel should be taken into consideration for the desired proportion. Mixing concrete that doesn’t adhere to the appropriate proportion can cause concrete deterioration prematurely..

In actual and masonry work, there are several factors that might affect the accuracy of the estimate. Some of which are enumerated as follows: Ordering of Course Aggregate must be Specific as to:.

[Audio] Figure 1-2 of the presentation provides an example of a concrete pavement. These pavements are composed of a blend of gravel, sand, water and cement, and are commonly used in road construction. Concrete pavements offer longevity due to their strength and durability, and also provide a comfortable driving experience due to their smooth surface. Furthermore, concrete pavements provide greater safety for drivers compared to other pavement surfaces..

[Audio] Good morning. To calculate the concrete pavement volume, thickness, width and length are taken into account. The volume equals thickness multiplied by width and length. In this case, the volume is 1.5 cubic meters. By referring to Table 1-2, it is determined how many bags of cement, sand and gravel are needed. The computation is done using a 40kg. cement, class C mixture. However, if no 40kg. cement is available, the calculation is done using a 50kg. cement and its respective values. In this scenario, 7.5 bags of cement, .75 cubic meters of sand and 1.50 cubic meters of gravel are required. That is the simplified construction estimate prepared by Max Fajardo and reported by Ancla, Krista Marie; Dajonan, Marianne and Ravelo, Sarah Lyn..

[Audio] Multiply the length and width of the slab to get the area. Divide the area by the area of a square foot. Multiply the result by the slab's thickness to get the total cubic yards of concrete needed for the slab. The area method can help determine the amount of material needed to fill the space..

[Audio] We have a solution for concrete simplified construction estimates in slide number 12. Given an area of 15 squared meters, we referred to Table 1-3, multiplied by .6 for cement, .05 for sand and .1 for gravel. The result matches the one provided in Illustration 1-1, indicating our solution is correct and provides a valuable starting point for constructing a simplified estimate..

[Audio] When it comes to estimating materials for a concrete column, two main methods can be used: the volume method and the linear meter method. The volume method works out the amount of concrete required by calculating the volume of the base and dividing it by the amount of concrete the column can hold. In the linear meter method, the length, width, and height of the base are taken into account to work out the necessary amount of concrete. Both these methods provide practicality and simplicity..

[Audio] Converting the dimensions to meters allows for the calculation of the volume of one square column - which is 1.75 cubic meters. This can then be multiplied by 8 columns to arrive at the total volume of 14 cubic meters. To calculate the material requirements for a concrete class “A” with 40 kg cement, this volume needs to be multiplied. This gives a total of 126 bags of cement, 7 cubic meters of sand, and 14 cubic meters of gravel..

[Audio] We will now learn about the simplified construction estimates for concrete columns. To save time and effort, we can utilize the linear meter method. The length of the column must be determined first. With the help of Table 1-4, the materials required can be calculated by multiplying the length by the corresponding values of cement, sand, and gravel found in Table 1-4. Let's begin..

[Audio] To find the total length of 8 columns, we multiply 8 columns by 7 meters to obtain 56 meters. To determine the cost of the concrete needed, we refer to Table 1-4. For a 50 x 50 cm column using 40 kg cement class "A" concrete, we multiply the length by 2.250 for cement, 0.125 for sand, and 0.250 for gravel. Comparing the results to Illustration 1-3, we can see that the answers are the same..

[Audio] Estimating the quantity of materials for concrete post and footing can be done through two methods: the Volume Method and the Area and Linear Meter Method combined for post and footing. This was researched and presented by Max Fajardo, and reported by Ancla, Krista Marie, Dajonan, Marianne and Ravelo, Sarah Lyn. We hope that this presentation has helped you understand concrete construction estimates better. Thank you for listening..