on its compressive strength by progressively replacing the natural concrete aggregate (NCA) by recycled aggregate. It is the experimental study of recycled concrete aggregate (RCA) when it is compared with the natural concrete aggregate on account of its properties. Cubes having dimension 150x150x150 mm3 were casted using recycled aggregate by replacing the natural aggregate by 0%, 25%, 50% and 75% and corresponding results of compressive strengths were noted. The 28 days compressive strength was noted
This paper evaluates the effect of heat on the compressive strength of concrete by way of comparing the strength of concrete that is subjected to heat treatment with unheated one. Concrete ingredients available locally were obtained for the production of concrete cubes into a dimension of 15x15x15 cm. A total of 12 cubes were casted and then cured at room temperature (28 °C). The cubes were divided into 4 sets. Each set comprised of 3 cubes for each Water-Cement ratio. Two of these sets were cured
Type chapter title (level 3) 3 Type chapter title (level 1) 4 Type chapter title (level 2) 5 Type chapter title (level 3) 6 1.0 Introduction Compressive strength of cube testing is to measure the compressive strength of concrete using the cube test. The property of concrete tested is compressive strength. Curing is the maintaining of an adequate moisture content and temperature in concrete at early ages so that it can develop properties the mixture was designed to achieve
experiences. Compressive strength of concrete is determined by conducting standard uniaxial compression test on standard cylindrical sample specimens of ages 7 & 28 days, following the standard procedure and test values are reported in accordance with ASTM and ACI standards . If the strength value obtained from the test is less than the required strength after 28 days from date of placing of concrete, the entire process of concrete mix design has to be repeated until the required strength value is
3.2 MATERIALS 3.1.1 Cement: Ordinary Portland cement available in local market of standard brand was used in the investigation. Care has been taken to see that the procurement made from a single batch and is stored in airtight containers to prevent it is being affected by atmospheric, monsoon moisture and humidity. The Cement is tested for its various proportions as per IS 4031-1988. The specific gravity was 3.10 and fineness was 3200 m2/Kg. The details are given in Table 4.1.1. The cement confirms
Mixing [C] Grading [D] Batching. The length of time for which the concrete mixture remains plastic predominantly depends on the ………………………………………………… [A]Setting time of cement [B] Amount of mixing water [C] Atmospheric temperature. Generally the strength of concrete is represented by the crushing stress of concrete cube of size ……………………………….. [A] 50 mm [B] 100 mm [C] 150 mm [D] 250 mm. An aggregate is said to be flaky, if its least dimension is less than…………………. [A] 2/3 mean
feature of glass that allows the outside world to see through it. Glass can be transparent from two sides or one side. When it is transparent from one side the other side is a mirror. Strength of Glass: Glass strength is the ability to tear or break glass. Glass is a fragile material but we can increase its strength by adding plates and some other additives. Workability of Glass: Glass can be poured and formed on any shape and blown during melting. Therefore, glass viability is a superior property
The brick occurs to mind when the story starts by talking about lightness. A brick itself is light to be handled manually, but a brick house is hefty. The brick is made from dried mud; that makes clearer the meaning of lightness of brick. Then, the land that holds the mud means a full deadweight. Heaviness from lightness and lightness from heaviness, there are various possible ways to investigate the relationship between heaviness and lightness through the brick; that’s why we should discuss heaviness
(Book by Hunter) Wearing courses / surface courses SMA Stone Mastic Asphalt (SMA) has a course aggregate skeleton like porous asphalt but the voids are filled with a fine aggregate/filler/bitumen mortar. It differs from hot rolled asphalt (HRA) in that the mortar is designed to just fill the voids in the course aggregate, whereas in hot rolled asphalt, course aggregate is introduced into the mortar and does not provide a continuous stone matrix. (Hunter, 1994) Figure 1 – Newly Laid SMA In Figure
CHAPTER 3: ANALYSIS 3.1 Brick Veneer 3.1.1 Brick Veneer - Material Brick is an excellent material if you are concerned about protecting your home from termites, mold, fires, or other natural causes which could damage a home. It is mainly made out of two components clay sand shale. There are 6 crucial steps to creating a brick: • Mining clay from the ground • Grinding clay to fine powder • Mixing clay with water • Forming wet clay into desired brick shape • Drying brick, and firming shape
Suddenly the brick occurs to mind when the story starts by talking about lightness. A brick itself is small and light enough to be handled by hand, but a brick house is hefty. The brick is made from dried mud; that makes clearer the meaning of lightness of brick. However, the land that holds the mud means a full deadweight. Heaviness from lightness and lightness from heaviness, there are various possible ways to look into the relationship between heaviness and lightness through the brick; that’s
increase the slump if the water content is not reduced. Slump loss results in decreased workability and reduced time for placing the concrete. When the water-cement ratio is decreased, the strength of the admixture increases. Concretes with an equal contents of water, air content and the slump; the 28-day strength of a water-reduced concrete consisting of a water reducer can be 10-25% greater than concrete without the
Corinaldesi, et al. evaluated compressive strength of concrete. The Compressive strength of concrete was determined at 3, 7 and 28 days age of curing. The addition of both red and blue pigments caused a certain strength loss never higher than 3 MPa. Moreover, the use of CaO together with shrinkage reducing admixture (SRA) allowed to fully recovering the slight strength loss due to the red pigment addition. At the dosage of 20 kg/m³ slightly reduces concrete compressive strength. The use of shrinkage reducing
cylinder specimen is within the ± 0.05 to its average mass. Compressive stress and Tensile stress testing It is noted that splitting strength of concrete is very low compared to the compressive strength where Splitting strength only represents about 10% of the compressive strength. Specimens Splitting Test Results Compressive Test Results cylinder 2.592 19.71 2.643 24.84 3.318 22.51 Figure 16: Splitting test results Vs. Compressive test results for cylinder specimens The reason for this is
Concrete : The word concrete comes from the latin word “concretus” (Meaning compact or condense) . Concrete is made by mixing (Cement, Water, Course and fine aggregate, admixture as required) The main theme of our project is to determine the compressive strength of concrete specimen under the implementation of cold and hot water curing. As cold and hot water effects concrete in different ways which will be further tested and analyzed on the basis of various previous researches, and also will be examined
• Three types of compression test specimens are used: cubes, cylinders and prisms. In our country, usually cube and cylinder are used. The concrete grade is based on the 150 mm size cube strength and if the cylinder is tested, the strength should be modified into equivalent cube strength. • The size of standard cube specimen is 150 mm x 150 mm x 150 mm. If the largest nominal we of the aggregate does not exceed 20 mm, 100 mm x 100 mm x 10 mm size cubes may also be used as an alternative
The addition of Silver provides strength, Tin for workability, Copper for corrosion resistance and Zinc to prevent oxidation. One of the advantages of using silver fillings as a dental material is its durability. These fillings are able to last 10-15 years, which usually is much longer than other types of tooth fillings. The strength of this filling is strong enough to resist wear due to chewing forces. This is especially seen when the filling has good bulk strength. However it could be easily chipped
Portland cement. 2.2.1.11 High Alumina Cement High alumina cement (HAC) is special cement, manufactured by mixing of bauxite (aluminum ore) and lime at a certain temperature. This cement is also known as calcium aluminum cement (CAC). The compressive strength of this cement is very high and more workable than ordinary Portland cement. 2.2.1.12 Expansive Cement The cement which does not shrink during and after the time of hardening but expands slightly with time is called expansive cement. This type
authors, of an invited paper on SCC for JACT 2003 have changed the term for the proposed concrete, for their work, to “Self – compacting High performance Concrete”. 1.4 MECHANICAL CHARACTERSTICS: Characteristic compressive strength at 28 days shall be 25 – 60 Mpa. Early age compressive strength shall be 5 – 20 Mpa at 12 – 15 hours (Equivalent age at200 C) “Normal” creep and shrinkage 1.5
Ordinary Portland cement (C 53 grade) conforming to the requirements of IS 12269 (ASTM C 150-85A) was used in the study. Natural river sand was used as fine aggregate and crushed angular granite stone was used as coarse aggregate. Coarse aggregate with combined grading of 50% passing through 20mm sieve and retained on 12.5mm and 50% passing through 12.5mm and retained on 4.75mm sieve conforming to IRC 44 was adopted. The bulk specific gravities of the coarse aggregate and fine aggregate were 2