Tools COMPRESSIVE STRENGTH AND MODULUS OF ELASTICITY OF GEOPOLYMER CONCRETE WITH MANAJEMEN RISIKO KONTRAK ANTARA KONTRAKTOR DENGAN SUBKONTRAKTOR.

34 7 Beaker glass 1000ml is used as a place to make NaOH 12M. The beaker glass can be seen in Figure 4.17. Figure 4.17 Beaker Glass 8 Sticky plastic which is used to cover the inside mold from the mixture. So, the mixture will be not sticky to the mold. The sticky plastic can be seen in Figure 4.18. Figure 4.18 Sticky Plastic 35 9 Abrams cone is used to identify and determine the value of the slump before the sample put into the cylinder. Abrams cone is truncated cone with a diameter of over 100 mm, bottom diameter of 200 mm and has a height of 300 mm. The abrams cone can be seen in Figure 4.19. Figure 4.19 Abrams Cone 10 Concrete Mortar tub is used as a base to make the mixture. The Concrete Mortar tub can be seen in Figure 4.20. Figure 4.20 Mortar 36 11 Cylinder molds with the diameter are 70 mm and 150 mm and the height are 140 mm and 300 mm. The cylinder molds can be seen in Figure 4.21. Figure 4.21 Cylinder mold 12 Oven is used to curing geopolymer concrete. The oven can be seen in Figure 4.22. Figure 4.22 Oven 37 13 Universal Testing Machine UTM with the brand Shimadzu UMH-30 is used to test the compressive strength of geopolymer concrete. The UTM with the brand is Shimadzu can be seen in Figure 4.23. Figure 4.23 Universal Testing Machine UTM 14 The Brush will be used to smear the oil onto the sticky plastic. The brush can be seen in Figure 4.24. Figure 4.24 Brush 38 15 The capping is used as a place of sulfur. After the sulfur is placed on it, the concrete will be put onto the capping. If the sulfur is already dry, take the concrete off. The capping can be seen in Figure 4.25. Figure 4.25 Capping 16 The plastic bucket is used as a place of aggregate and sand. The plastic bucket also used as a place of the geopolymer mixture. The plastic bucket can be seen in Figure 4.26. Figure 4.26 Plastic Bucket 39 17 The pan is used as a place to cook the sulfur. The pan can be seen in Figure 4.27. Figure 4.27 Pan 18 The plate is used as a place of oil, sand, coarse aggregate and so on. The plate can be seen in Figure 4.28. Figure 4.28 Plate 40 19 The ruler is used to measure the size of cylinder and measure the sticky plastic. The ruler can be seen in Figure 4.29. Figure 4.29 Ruler 20 The wagon is used to carry the mold from one place to the other place. The wagon can be seen in Figure 4.30. Figure 4.30 Wagon 41 21 The shovel is used to stir the mixture and take the materials. The shovel can be seen in Figure 4.31. Figure 4.31 Shovel 22 Hammer is used to hit the mold. When the mixture is put into the mold, the outside wall of the mold should be tapped with hammer. The aim of tap the mold is to make the mixture in the mold fill the blank spaces. The hemmer can be seen in Figure 4.32. Figure 4.32 Hammer 42 23 The iron is used to pound the mixture in the mold. The aim of the iron is same with the hammer but directly into the mixture. The iron can be seen in Figure 4.33. Figure 4.33 Iron to Pound the mixture 24 The plastic bag is used as a place of some materials. Sand, metakaolin coarse aggregate and silica fume can be put into the plastic bag to keep the materials from the outside condition. The plastic bag can be seen in Figure 4.34. Figure 4.34 Plastic Bag 43 25 The stationery is used to help the writer to complete the works such as cut the paper, sticky plastic, write, make a line, and erase. The stationery can be seen in Figure 4.35. Figure 4.35 Stationery 44

4.6. Material Testing

Before start to make the specimen there should be a test to each material. The aim of test the material is to determine the feasibility of the material to be used. In this experiment there will be 3 material tests that will be done; fine aggregate, coarse aggregate, and metakaolin. The aim of metakaolin test is to know the chemical content inside the metakaolin. Whereas to test the feasibility of fine aggregate and coarse aggregate is carried out as follow

4.6.1. Fine Aggregate

1. Determine the organic substance in the sand  Put the dry sand into measured glass 250cc until reach the 130 cc.  Pour NaOH 3 to that measured glass until it reaches 200cc.  Shake the sand and NaOH 3 in ± 10 minute and let it in 24 hours.  Write the color of the liquid that happened on the top of the sand and compare it by using “Gardner Standard Color”. 2. Determine the amount of mud in sand  Take 100gr oven-dried sand and pour into the measured glass 250 cc. 45 The Amount of Mud = � � x100  Pour the water into measured glass until 12cm above the sand, marked by rubber. After that, shake it in 1 minute and let it in 1 minute so the sand will sink.  Dirty water above the sand is pour out, the sand stays in the measured glass.  Then pour water into measured glass, same as in process 1 – 3. Do it continuously until the water is clear.  After the water is clear, pour the water out and pour the sand into the plate.  Dry the sand in the oven at 105°C – 110°C about 24 hours.  Take the sand from the oven and put in the cool desiccator.  After cooling the sand, measure the weight B gram.  Calculate the amount of mud in the sand: 4-1 with: B = Weight of Sand 46 3. Density and Absorption  Weigh ± 500 grams of sand from sieve 4 and soak in water for ± 24 hours.  Dry the aggregate so the aggregate can reach the SSD Saturated Surface Dry.  Put the fine aggregate into the cone to determine whether the aggregate reach SSD or not.  First put 13 and then pound it for 8 times. Then put again to 23 and pound it for 8 times. Then put until full and pounded 8 times, and the cone is filled to the top.  Lift the cone slowly. If there is a decrease of at least 14 and 13 of the maximum height of the cone, then the aggregate in an SSD  Put the aggregate into the Erlenmeyer flask of 500 grams, and then add the water up to the limit of 500 ml.  Stir the mixture in Erlenmeyer flask to remove the air bubbles in it. After that, put the Erlenmeyer flask is in a bucket of water water covered the flask to the limit of water in the Erlenmeyer flask wait for ± 1 hour. Add water up to 500 ml and weighed. Then, the sand and the water is released into a cup, let it settle. After settles throw away the water. 47  Put the sand into the oven at 110 ° C for ± 24 hours, chill it, and weighed. 4. Water Content  Prepare the pan in the dry condition and weighed it.  Put 100 grams of fine aggregate into the pan and then weighed.  Put the pan which already filled with the fine aggregate into the oven with the temperature is 110°C for 24 hours.  After 24 hours, chill the pan which already filled with fine aggregate, then weighed. Note the results.  The water content of the aggregates is calculated by the formula: 4-2 with: A = The weight before aggregate before put into the oven B = The weight before aggregate before put into the oven