Specimen: 3 cubes of 15 cm size Mix. M20 Mixing of Concrete for Cube Test: Mix the concrete either by hand or in a laboratory batch mixer. Hand mixing was used for this experiment. Hand Mixing: Mix the cement and fine aggregate until the mixture is thoroughly blended and is of uniform color, add coarse aggregate and mix until the coarse aggregate is uniformly distributed throughout the batch, add water and mix until the concrete looks homogeneous and of the desired consistency. Sampling of Cubes for Test: Clean the mounds and apply oil, fill the concrete in the molds in three layers, compact each layer with 25strokes per layer uniformly distributed using a tamping rod of steel bar 16mm diameter and 60cm long, bullet pointed at lower end three times and level the top surface then smoothen it with a trowel.
iii) Mix the dry constituents thoroughly to get a uniform colour and then add water. Place the mixed concrete in the cleaned slump cone mould in 4 layers, each approximately ¼ of the height of the mould. iv) Each layer is tamped 25 times by the rounded end of the tamping rod (strokes are distributed evenly over the cross section). vi) After the top layer is rodded, the concrete is struck off the level with a trowel. vii) The mould is removed from the concrete immediately by raising it slowly in the vertical direction.
A sample of 400 gm. of cement was taken and a paste with weighed% of water was prepared for the trial. The paste was prepared in standard manner and filled into the vicat mould within 3-5 min. after completely filling the mould was sharked to expel out air. A standard plunger of 10mm dia.
The apparatus used to measure bulk density are consists of 100 ml cylindrical vessel of stainless steel, electric oven and balance with sensitivity 0.1 gram and a tamping rod. 1- A sufficient quantity of powder is passed to complete the test through a 1.0 mm sieve to break up agglomerates that have formed during storage . 2- the obtained sample are flows freely through the measuring vessel until it overflows. 3- the excess powder from the top of the container is carefully scraped. Determine the mass of the powder to the nearest 0.1% by subtraction of the previously determined mass of the empty measuring vessel.
The mechanical properties of concrete determined in the laboratory include compression strength, splitting tensile strength and flexural tensile strength. The influence of partial replacement of fine aggregates by copper slag on the compressive strength, split tensile strength on cylinders and flexural strength of prisms has been evaluated. The test results showed that there is a possibility of use of copper slag as fine aggregate in
The permeability number of the sand sample can be calculated from the following equation: P =V h/A t p (4.1) Where P = AFS standard permeability number V = Volume of air in cm3 = 2000 cm3 h = Height of specimen in cm = 5.08 cm (or, 2 inches) A = Cross sectional area of specimen in cm2 = 20.268 cm2 p = Air pressure in g/cm2 = 10 g/cm2 t = Time in minutes The above equation may be simplified as P = 3007.2/t (4.2) Where, t = time in seconds. 6. Sand Strength Test Fig.5. Universal Strength Machine Sand strength test is the measure of holding power of various bonding materials in green and dry sand. It determines the cohesiveness or natural binding capacity of the sand grains.
Compression test were carried out for cube and cylinder specimen using steel and Recron 3S fibres. A total of 18 cube specimen using steel fibres were prepared for the testing at the age of 7 and 28 days. Another 18 cube specimen was prepared using Recron 3S fiber. Also 36 cylinder specimens were casted using both fibres for the testing at the age of 7 and 28 days. A cube size of 150 x 150 x 150 mm and cylinder size of 150mm diameter and 300mm length was adopted.
It was processed to become the samples as shown in the following Table 1. The fabrication of the green body was printed by extrusion method of pressure 25 MPa. The details of the processing step of the membranes are displayed in Figure 2. Prior to the extrusion process, all materials were mixed at the rotational speed of 64 rpm for 30 min. After that, its were continued for blending process by water addition of 20 wt.% and 5 wt% oil.
The completely dried and activated plates are kept in a dry place for use. The crude extract applied in a row or bands of spots as a concentrated solution by using the capillary tube at least five times on each plate with concerning the drying of each spot before the another application.The solvent system (S5) ( rutin and quercetin) , and S7 (genistein), put in a glass tank (22.5 x22 x7)cm, covered with glass lid and allowed to stand for 45 min.in order to saturate the tank before use. By the aid of Liebermann burchard reagent and UV at 254 nm the bands can detected. The target bands after detection were scratched off the developing plate , collected in dry, clean beaker and mixed with mobile solvent of chloroform- methanol (60:40), then heated with continuous stirring and filtered. After the evaporation of the mobile solvent
(a) penetrant, (b) solvent remover, (c) developer After selection of high quality weld specimen, its goes to destructive testing for analyze the properties of material. Here Vickers hardness test and tensile test are conducted for analyze properties of material. So performing tensile test welded specimens were cut with dimension of 100 mm x 25 mm, which were further cut in to I shape. Tensile test was performed with universal tensile testing machine (Instron-600) with maximum load capacity of 600 kN. Further, non preheated, 3000C and 7000C preheated specimen were selected for microstructural study and micro-hardness measurement from each sample.