The Effect Of Crushed Quartz Filler On Water Reduction

Superior Essays
3.4. Ternary systems MgO-SF-QF (MgO-SiO2-Quartz fillers)
3.4.1. Effect of crushed quartz filler on water reduction
The idea of adding crushed quartz filler to M-S-H binder is inherited from replacement of Portland cement with quartz filler to improve the rheology of cement paste [25] due to the less water absorption and smooth texture of finely ground quartz particles.
Fig. 9 described water reduction effect as adding crushed quartz filler (QF) to MgO-SiO2 binary system to maintain a fixed flow of MgO-SF-QF ternary system (Series 3, 4, 5). It is obvious that the replacement of cementitous materials by crushed quartz filler improves rheology considerably, expressed by the consistent reduction of water content while maintaining a fixed flow of
…show more content…
Samples without filler, although contain highest gel volume but also requires highest water content in the series (w/b=0.36) and consequently has lowest 28-day compressive strength of 43.7 MPa. The introduction of filler content, as at only 10%, is able to reduce water content dramatically to w/b=0.27, leads to the impressive improvement of compressive strength to 85 MPa. Further increase of filler content to 40% results in higher reduction of water content to as low as w/b=0.21 with only a marginal increase of compressive strength to 87 MPa. Testing results have shown that ternary M-S-H binder systems of MgO-SF-QF have higher compressive strength, compared to binary system without fillers. Crushed quart filler is mainly “inert”at room temperature, however, is able to improve workability considerably in M-S-H ternary system (MgO-SF-QF). Fillers content is effective from 10-40% of the binder without clear optimal …show more content…
CONCLUSION
In this paper, M-S-H mixtures have been prepared and tested to suggest the optimal binder composition to obtainhigh compressive strength paste and mortar with M-S-H binder system. The following concluding remarks have been found from the optimization process:
The binary M-S-H binder system composed of MgO and silica fume containing very high microfine content requires extremely high water content. The use of suitable superplasticizer is critical to reduce water demand in which the optimal dosage of Viscocrete-5-555 (a polycarboxylate SP) is about 3-4% (1-1.5% solids).
The formulation of M-S-H-gel is not the only contributor to thestrength of the binder. The MgO/SiO2 ratio for optimal strength is also dependent on other factors including optimized workability and packing density. Selection of binder composition is therefore complicated and should results from total effect of those factors above.The MgO/SiO2 ratio for optimal compressive strength is found at mixture containing 60% MgO-40% SF.
Use of crushed quartz filler is of utmost important to reduce water content of silica fume. Replacement of M-S-H binder by crushed quartz filler from 10-40% results high strength mixture with very low water to binder

Related Documents

  • Superior Essays

    Pah Lab

    • 1911 Words
    • 8 Pages

    In this experiment, two different Bentonite clays (zeolites) were synthesized, one magnetized and one not, to determine if either material could possibly be a better sequestering agent than charcoal. Introduction PAHs are a group of chemicals that pollute both the environment and water supply through the incomplete burning of coal, oil and gas, trash, tobacco, and other organic substances High concentrations of PAHs in the environment are a serious concern due to the fact that they are human carcinogens as well as toxic to wildlife Due to their detrimental nature, there are measures being take to remove these pollutants from the environment, especially in water sources. The most common method for doing this is by utilizing a sequestering agent, which is often charcoal This purpose of…

    • 1911 Words
    • 8 Pages
    Superior Essays
  • Great Essays

    Cellulose Case Study

    • 2188 Words
    • 9 Pages

    Extracellular or bacterial cellulose (BC) synthesized by nonpathogenic aerobic bacteria in a culture medium containing carbon and nitrogen sources can be promising biodegradable nanofibers for composite materials because of their excellent mechanical properties [1]. Although BC is chemically identical to plant-based cellulose, it exists in extremely pure form and does not contain any hemicellulose, lignin, pectin or wax materials [2]. In addition, it has higher crystallinity, degree of polymerization, specific surface area, and significantly higher mechanical properties compared to the plant-based cellulose [3,4]. It has some other unique properties, such as low density, low thermal expansion as well as high optical transparency [1,5]. As a…

    • 2188 Words
    • 9 Pages
    Great Essays
  • Improved Essays

    To begin the first part of the experiment, zeolite and magnetized zeolite had to be synthesized. First, it was necessary to set up a contraption to hold a thermometer in place. This was done using a split cork and a 3 prong clam on a ring stand. 50 mL of 3.0 M NaOH was then added to a 250 mL beaker with a magnetic stir bar placed inside. After placing the solution on the stir bar, 3.7560 g of (sodium aluminate) was added to the solution.…

    • 398 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    Through the results, we proved that distilled water and 10% sucrose solutions made the…

    • 942 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Liquid Compounding Process

    • 1173 Words
    • 5 Pages

    1.0 PURPOSE: To implement a process that will ensure that non-conforming batches will go through the correct process and procedure for correction/adjustment and that all documentation and subsequent batch releases are issued to the work order for filling. This procedure will also eliminate accretion of previous blends in the liquid compounding area. 2.0 SCOPE: This procedure applies to the Liquid Compounding, Pre-weigh area and Lab. 3.0 RESPONSIBILITY: It is the responsibility of the Compounding Manager, Compounding Lead and Compounding associate, Scheduling Clerk, Pre-weigh Manager, Pre-weigh associates, Lab Manager and Lab Technicians to follow this procedure.…

    • 1173 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    The purpose of this lab was to prepare tetraphenylcyclopentadienone most commonly known as tetracyclone. This involved a 3-step synthesis over the course of 3 weeks. The first step was the preparation of benzoin, which was completed through self-condensation of benzaldehyde with thiamine used as the base catalyst of the reaction. The next step was the preparation of benzil from the oxidation reaction of benzoin with nitric acid. In the oxidation reaction, the alcohol functional group of benzoin was oxidized to form the carbonyl functional group of benzil, while the nitric acid was reduced into a mixture of nitrogen oxides that formed toxic brown fumes.…

    • 1200 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    Percent Composition Lab

    • 301 Words
    • 2 Pages

    In this lab, the percent composition of each component in the mixture was calculated. The mixture contained NaCO, CaCO3, and sand. NaCO or salt had a physical change when it completely dissolved in water. A chemical change occurred when hydrochloric acid was added to CaCO3 or chalk because the mixture changed to a yellow green color. In order to obtain the percent composition, a filtration system was used to separate the sand from the liquid, by straining the solid with the use of filter paper.…

    • 301 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    The mixture was filtered and dried before being transferred to a vial. Some of the mixture was then added to tempera paint with water and mixed to form a light blue paint. The crystals from the last experiment were then crushed and added to another mix of paint and water to make a different light blue…

    • 663 Words
    • 3 Pages
    Improved Essays
  • Great Essays

    The resulting solid was placed into a 25-mL round bottomed flask along with maleic anhydride (0.245 g, 2.50 mmol) and triglyme (4 mL). Then, the flask was fitted with a reflux condenser and refluxed in a sand bath for 5 min. The soln was cooled and had ethanol (2mL) and sodium hydroxide (6 mL) added. The resulting mixture was filtered and the solid was rinsed with cold ethanol and cold water to once again remove the brown color. Methanol was then used to recrystallize the resulting white solid (0.065 g, 0.256 mmol,…

    • 2179 Words
    • 9 Pages
    Great Essays
  • Decent Essays

    Methyl Benzoate Essay

    • 185 Words
    • 1 Pages

    Methyl benzoate (by mass or volume): 3.0500g Sulfuric acid used: 96% Nitric acid used: 70% Product weighing before recrystallization: Weight sample bottle + product obtained (g): 8.471g Weight of sample bottle (g): 0.980g Weight of product obtained (g): 7.491g Product weighing after recrystallization: Weight sample bottle + product obtained (g): 4.795g Weight of sample bottle (g): 0.980g Mass final product (g): 3.815g Melting point of the sample obtained: 79˚C Chemical reaction of methyl benzoate: C6H5CO2CH3 + H2NO3  C6H4CO2CH3NO2 + H2O Number moles of C6H5CO2CH3 Molar mass of C6H5CO2CH3 = 136.1479 Mass of C6H5CO2CH3 = 3.0500 g Number of mole = 3.0500 g/ 136.1479 = 0.022 mol 1 mol of C6H5CO2CH3 needed to produce 1 mol of C6H4CO2CH3NO2…

    • 185 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    Conjugated Diene

    • 931 Words
    • 4 Pages

    The flask was attached to a reflux condenser and the mixture was reflux for 45 minutes, during which butadiene sulfone was decomposed. The mixture was allowed to cool and then transfer to another 100 mL beak, with the addition of 10 mL of tetrahydrofuran. A small amount of charcoal was added to the solution, mixed, and vacuum filter. Hexanes (50 mL) were added to the filtrate, cooled in an ice bath, and vacuum filtrate once more. The precipitate was washed hexanes (15 mL) and dry on the filter (with vacuum) for 10 minutes.…

    • 931 Words
    • 4 Pages
    Improved Essays
  • Decent Essays

    In the aspect of the effect of carbonate chemistry on the performance of struvite precipitation, the pH of the solution was reduced when the amount of carbonate chemistry increases. In the…

    • 211 Words
    • 1 Pages
    Decent Essays
  • Superior Essays

    Terrazzo, composites, and concrete are all materials that can be used in the interior of a space. In this paper, I am going to explain the similarities and differences between concrete and terrazzo, what each material is composed of, how these materials are used, and the different subcategories of each material. I’m also going to discuss how each material can be altered, in terms of the look and feel of it. Composite flooring is composed of aggregate and a binder, also known as the matrix. The aggregate is usually stone or glass chips, and the binder is usually concrete or epoxy.…

    • 1017 Words
    • 4 Pages
    Superior Essays
  • Improved Essays

    Sidewalk Essay

    • 1432 Words
    • 6 Pages

    Sidewalks play a very important role when it comes to the safety and convenient transit of pedestrians. In this document you will learn how to pour and finish concrete into an area that has already been prepared. The dimensions of the slab we will be working with are, 5ft by 5ft by 4in deep. The sidewalk you will be completing will be in a standard neighborhood. It is best to start this task in moderate weather.…

    • 1432 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    The crude product was then allowed to drain under vacuum until nearly dry. The aqueous filtrate was disposed of in the sink with running…

    • 1570 Words
    • 7 Pages
    Improved Essays