Quartz Powder Research Articles

Engineered Stone Produced with Glass Packaging Waste, Quartz Powder, and Epoxy Resin

Engineered stone (ENS) is a type of artificial stone composed of stone wastes bonded together by a polymeric matrix. ENS presents a profitable alternative for solid waste management, since its production adds value to the waste by reusing it as raw material and reduces environmental waste disposal. The present work’s main goal is to produce an ENS based on quartz powder waste, glass packaging waste, and epoxy resin. The wastes were size-distributed by the fine sieving method. Then, the closest-packed granulometric mixture, as well as the minimum amount of resin that would fill the voids of these mixtures, was calculated. ENS plates were prepared with 15%wt (ENS-15) and 20%wt (ENS-20) epoxy resin by vibration, compression (10 tons for 20 min at 90 °C), and vacuum of 600 mmHg. The plates were sanded and cut for physical, chemical, and mechanical tests. Scanning electron microscopy analysis of fractured specimens was performed. ENS-15 presented 2.26 g/cm3 density, 0.1% water absorption, 0.21% apparent porosity, and 33.5 MPa bend strength and was resistant to several chemical and staining agents. The results classified ENS as a high-quality coating material, technically and economically viable, with properties similar to commercial artificial stones. Therefore, the development of ENS based on waste glass and quartz powder meets the concept of sustainable development, as this proposed novel material could be marketed as a building material and simultaneously minimize the amount of these wastes that are currently disposed of in landfills.

Study of nonlinear relationships between dosage mixture design and the compressive strength of UHPC

With advances in building materials research, new materials more suitable for specific applications due to their superior durability and mechanical properties are emerging to meet the requirements of infrastructure construction and maintenance. In this sense, ultra-high-performance concrete (UHPC) is considered one of the most promising materials for concrete construction. However, a traditional UHPC mixture contains large amounts of cement, silica fume, superplasticizer, and other expensive and high carbon footprint components. Hence, several researchers have focused on developing alternative UHPC dosages using locally available materials, including several mineral admixtures, to obtain a more affordable and sustainable UHPC. Therefore, deep knowledge about the relationships between the UHPC dosage and its resulting properties could help to improve these developments. However, these relationships are nonlinear and complex. This paper aims to address this gap by using a random forest model trained with a 931 UHPC mixture collection with 17 input variables and a unique response, namely the UHPC compressive strength. After adjusting a regression model, different tools, such as input variable importance analysis and partial dependence plots, were used to assess the nonlinear relationships between the dosage of UHPC and its resulting compressive strength. In most cases, a proper alignment was observed when the findings provided by these analyses were contrasted with the results provided by other researchers. The results indicated that the inputs with the highest significance on UHPC compressive strength are those related to water content, the packing density, and the quartz powder and superplasticizer dosages, followed by the cement content. Furthermore, mineral admixtures with high amorphous SiO2 content, such as RHA and SF, presented a relevant contribution to the compressive strength, while the other admixtures would seem to have a more modest contribution to it. Finally, it is also worth noting that the machine learning model created might help to create novel UHPC dosages by decreasing the duration and expenses of the experimental campaign by permitting the pre-selection of those components with a superior model response.

Experimental investigation and modeling on the dissociation conditions of methane hydrate in clayey silt cores

AbstractAs the majority of global natural gas hydrate reserve, the dissociation conditions of hydrate in clayey silts are of great significance for its efficient production. In this work, the dissociation conditions of methane hydrate in clayey silt cores were experimentally measured by step‐heating method at the temperature range of 280.76–289.55 K and pressure range of 8.11–15.03 MPa, respectively. Various cores including quartz powder, montmorillonite, and South China Sea sediments at the water content range of 20%–33% were used for investigation. The results showed that the dissociation temperatures of methane hydrate in clayey silt cores depressed compared to bulk hydrate. The grain size, salinity, and lithology of clayey silt cores significantly affect the dissociation conditions of hydrate. In comparison to grain size, salinity, and lithology had a more significant influence on the equilibrium temperature depression. The dissociation temperature depression of methane hydrate was considered as a consequence of the water activity depression which is caused by the effect of capillary, salt, or clay. A water activity meter was used to measure the water activity in clayey silt cores. The influence of salt component and mineral characteristics on the water activity was investigated. By combining the measured water activity data with the Chen‐Guo model, a novel water activity measurement (WAM) method for the hydrate dissociation conditions prediction was proposed. With the maximum deviation less than 12%, the predicted results are in good agreement with the experimental data. It demonstrated that the WAM method could effectively predict the dissociation conditions of methane hydrate in clayey silts with convenience and accuracy.

Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers.

Geopolymer is a new type of synthesized aluminosilicate material. Compared with ordinary Portland cement, it has better fire resistance and durability, and is more environmentally friendly. In this paper, a high-strength metakaolin-based geopolymer composite (HMGC) has been developed by utilizing quartz powder and steel fibers. The optimization compositions and effect of curing temperatures (from ambient temperature to 90 °C) on the strength performance of the HMGC is studied. The optimized 1-day compressive strength of the HMGC can reach 80 MPa, and the 3-day compressive strength is close to 100 MPa (97.49 MPa). Combined with XRD, FTIR, SEM and MIP characterization, the mechanisms behind the strength development under different curing temperatures are analyzed. The results show that heat curing can significantly speed up the process of geopolymerization and increase the early strength of the HMGC. However, long-term heat curing under high temperature (such as 90 °C, 7 days) would reduce the mechanical strength of the HMGC. Prolonged high-temperature curing increases the pores and micro-defects in the gel phase of the HMGC, which may be attributed to chemical shrinkage. Thus, the curing temperature should be carefully controlled to make a HMGC with better performance.

The radiation shielding and microstructure properties of quartzic and metakaolin based geopolymer concrete

Today, binders with low CO2 emissions are preferred in building design. Geopolymers have lower CO2 emissions than conventional concrete and Portland cement. This study investigated the efficiency of geopolymers produced with short curing time and low curing temperature against gamma and neutron radiation. Ground blast furnace slag (GBFS), metakaolin and quartz powder were used as binders to produce geopolymers. In addition, 200, 400 and 800 kg/m3 quartz sand (with high SiO2 content) was used instead of river aggregate in the mixtures. Geopolymers were cured at 40, 60 and 80 °C for 6, 8 and 10 h. The hardened unit weights of geopolymers vary between 2160–2346 kg/m3. As the quartz sand content increased, the hardened unit weight of the mixtures increased. As the curing temperature increased, the unit weight of the mixtures decreased as the evaporation increased. The compressive strength of geopolymers varies between 40.3 and 153.9 MPa, and the flexural strength varies between 3.3 and 8.8 MPa. As the curing temperature and time increase, the mechanical properties of the mixtures improve as the geopolymerization increases. In addition, if quartz sand is used instead of river sand, the compressive strength can increase up to 40%. With the increase of quartz sand content, the capillarity coefficients of geopolymers decrease. Capillarity coefficients of geopolymer mixtures are below 0.10 kg/m2.min0.5. Besides, fast neutron/photon radiation-shielding features of the geopolymers were examined, experimentally. The M3 sample is more accomplished at absorbing gamma photons due to its higher GBFS content. The M1 sample with the highest concentration of quartz sand is the most effective sample at attenuating fast neutrons and has a better ƩR value to some commonly used neutron attenuators. As a result, it has been shown that geopolymers with a compressive strength of about 160 MPa can be produced after 10 h. This study also revealed that M1 and M3 samples can be put to good use for protection from fast neutron and gamma-ray radiations, respectively, and new geopolymer materials can be designed as shielding materials.

Low-Velocity impact resistance of reactive powder concrete modified using ground granulated blast furnace slag and rice husk ash

This study is meant to investigate the synergistic effect of ground granulated blast furnace slag (GGBFS) and rice husk ash (RHA) on the impact resistance of non-fibrous and fibrous reactive powder concretes (RPC). Non-fibrous and fibrous RPC mixes were prepared by replacing cement with GGBFS (at the levels 0%, 10%, 20%, 30%, and 40% by mass), and with two categories of fillers such as quartz powder (QP) and RHA. In addition to the impact resistance, basic properties such as the workability and compressive strength of the mixes were also evaluated. Chemical and morphological characterization of the mixes were done by performing X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively, and thermal stability of the mixes was evaluated by conducting thermogravimetric analysis (TGA). The results showed that the flow of RPC mixes was significantly reduced due to the addition of RHA, which was further reduced due to the addition of fibres. The fibrous mix with 30% GGBFS and RHA filler exhibited an improved compressive strength and impact energy absorption of 133.76 N/mm2 and 5353 N-m, respectively. The findings show that it is possible to develop sustainable RPC mixtures with good impact resistance by employing GGBFS as a supplementary cementitious material (SCM) and RHA as a reactive filler (which acts as an internal curing agent also).

Electrophoretic Deposited Quartz Powder-Assisted Growth of Multicrystalline Silicon

Ingot multicrystalline silicon (Mc-Si) needs to be improved in quality and reduced in cost compared with Czochralski monocrystalline silicon. A uniform and dense quartz nucleation layer was obtained by the electrophoretic deposition of quartz powder on the surface of the silicon wafer. The deposited silicon wafer was annealed at 600 °C for 1 h, and one side of the silicon wafer with the quartz layer was glued to the crucible. During the growth of Mc-Si crystal, the dense quartz powder can play a nucleation role. The results show that the average lifetime of the minority carriers a of quartz-assisted silicon ingot is 7.4 μs. The overall dislocation density of an electrophoretic deposition quartz-assisted silica ingot is low, and the defect density in the middle of the silica ingot is 1.5%, which is significantly lower than that of spray quartz (3.1%) and silicon particle (4.2%). Moreover, electrophoretic deposited quartz-assisted mc-Si can obtain oriented grains, which offers a potential to apply alkaline texturing on mc-Si wafers.

Outbreak of Silicosis in Workers Producing Artificial Stone Skirting Boards: A Novel Application of Silica-Based Composites

Outbreak of Silicosis in Workers Producing Artificial Stone Skirting Boards: A Novel Application of Silica-Based Composites

RESEARCH ON MECHANICAL PROPERTIES AND GROUTABILITIES OF GROUTED MORTISE-TENON JOINTS FOR PREFABRICATED STRUCTURES

Introduction: The paper addresses grouted tenon-and-groove joints in the prefabricated structure of Changchun subway station. For the first time, grouting of prefabricated structure joints with organic epoxy grouting material is analyzed. Purpose of the study: We aimed to make sure that an organic epoxy grouting material can be injected into the joints uniformly and in full and conducted its experimental study. To establish the applicability of the epoxy grouting material in the prefabricated structures, we studied the mechanical properties of the epoxy grout and its adhesive properties in relation to concrete. Methods: In the course of the study, we used a set of test equipment and an independently developed method. Results: High-quality grouting can be guaranteed at an injection pressure of 0.4 MPa and a temperature of 5–10°C. The relationship between the slurry flow rate and time was fit according to the experimental data at 5 and 10°C. The optimal quartz powder ratio was determined at the level of 1:0.6–1:0.8, and the optimal quartz powder particle size (D50) was determined at the level of 18–25 μm. The results of the study can provide references for similar projects in the future.

Decreasing the hazardous effect of waste quartz powder and the toxicity of epoxy resin by its synergistic application in industrial coatings.

Quartz powder sourced from industrial wastes is very hazardous. It is because it contains large amounts of fine particles. Thus, it has the potential to cause cancer and nervous system impact on humans and animals. Furthermore, its disposal leads to water pollution and plant pollination (negative for the environment). It will not be dangerous if incorporated into a hardened epoxy resin coating. In turn, epoxy resin is very harmful to the environment, in particular to aquatic organisms; therefore, it is necessary to reduce its mass in coatings by using additives. The article describes the systematic investigation of the adhesion of an epoxy resin coating and an economic and toxicity analysis showing the cost and toxicity reduction of the epoxy resin coating by replacing a part of the epoxy resin mass with waste quartz powder. The key novelty of the following article is to highlight a new way to decrease the hazardous effect of waste quartz powder, thanks to its utilization in epoxy resin coatings. Furthermore, the novelty is to decrease the toxicity of epoxy resin by reducing its mass necessary to make the industrial coating.

Effect of quartz powder on mid-strength fly ash geopolymers at short curing time and low curing temperature

Geopolymers are recommended as an alternative to Portland Cement, which has high CO2 emissions. Geopolymers are a more environment-friendly construction material produced using the precursor aluminosilicate powders. In this context, fly ash rich in SiO2 and Al2O3 is frequently used in geopolymer design. In this study, geopolymers were obtained using different quartz powder proportions (0, 50, 75 and 100%) instead of river sand. The produced geopolymer mixtures were subjected to heat curing at 40–60 and 80 °C for 6, 8 and 10 h. The physical, mechanical, transport and microstructural properties of geopolymers produced at low curing temperature and short curing time were investigated. Within the scope of the experimental study, 36 different geopolymer mixtures were produced. The hardened unit weights of geopolymer mixtures vary between 2170–2250 kg/m3. Unit weights are relatively low since the fly ash content in the mixtures is 1000 kg/m3. The compressive strength (1-day) of geopolymer mixtures varied between 7 and 60 MPa, and flexural strengths varied between 3 and 9.7 MPa. The mechanical properties of the mixtures improve as quartz powder, curing time and curing temperature increase. While the capillary water absorption of geopolymer mixtures cured at 40 °C exceeds 1 kg/m2, the capillary water absorption of mixtures cured at 80 °C is below 0.40 kg/m2. Since the fly ash rate is high in geopolymer mixtures, the alkali activator rate has also increased and therefore, the CO2 emission has exceeded 400 kgCO2/ton. However, as the compressive strength of the mixtures increased, the emission factor decreased. The N-A-S-H and crystal zeolitic phases were formed in the geopolymer matrix, as an observation of SEM, XRD, and FT-IR analysis. Withal, as the quartz powder increased, the crystal phase of the geopolymer matrix increased, also. As a result, it was determined that fly ash geopolymers with 60 MPa compressive strength could be obtained by using quartz powder in a short curing time of 10 h.

Performance and microstructure of ultra-high-performance concrete (UHPC) with silica fume replaced by inert mineral powders

Ultra-high-performance concrete possesses extraordinary strength and durability. However, the high preparation cost of UHPC limits its large-scale engineering application. Recently, some studies have been done on the incorporation of granite powder (GP) in UHPC. It is reported that the granite powder possesses low pozzolanic activity and could replace part of quartz powder (QP) under autoclave curing. However, the silica fume (SF) would preferentially consume the Ca(OH)2 generated from the hydration to some extent, where the inert powder like granite powder or quartz powder could hardly participate in the pozzolanic activity due to low Ca(OH)2 content. In this research, the properties of UHPC incorporated by the silica fume and the inert powders like granite and quartz powder were studied, which are SF20, GP20A, GP20B, QP20A and QP20B respectively. Then the hydration products and microstructure of them were analyzed by the X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), Energy Dispersive Spectrometer (EDS), 29Si nuclear magnetic resonance (NMR), and Mercury intrusion porosimetry (MIP). Results demonstrated that the replacement of inert powders to SF greatly lowers the rheological parameters like shear stress and apparent viscosity, and improvs the flowability. And the sample SF20 possesses the highest mechanical strength due to its dense pore structure, of which the compact tobermorite was found in the products but few Ca(OH)2 was found. Besides, the compressive strengths of samples QP20A and QP20B were close to SF20 because their similar hydration products, pore size distribution and mean chain lengths (MCL). Due to the lower reaction activity of GP-A, the sample GP20A possessed the lowest strength but the highest pore diameter and porosity. While the grounded granite powder showed the higher reaction activity, resulting in the formation of tobermorite and a finer pore size distribution and the higher strength in GP20B. Hence, it can be concluded that the pozzolanic activity of inert powders, the quartz powder and the granite powder, could be greatly improved by autoclave curing and reducing the particle size. This study provides the theoretical basis for replacement for silica fume with inert powder and the possibility to reduce the preparation cost of UHPC and to enlarge its application.

Influence of Curing Practices and Environment on Compressive Strength De-velopment of High Strength Concrete

The paper presents the impact of practicing curing techniques on the compressive strength evolution of ternary blended high strength concrete under local prevailing environmental conditions. Initially the control mix was designed using the guidelines of IS: 10262:2009, whose compressive strength at 28 days is greater than 70 MPa. Later mechanical properties of high strength concrete after incorporating the alternative binder materials was evaluated. For all mixtures water to cement ratio was kept as 0.25. For the purpose of improving the mechanical properties of control mix and to achieve the economy slag, fly ash, quartz powder and silica fume were incorporated in the mix as partial substitution of cement. Total replacement with supplementary binders was kept at 20% by its weight of cement. Among all the combinations, silica fume and slag combination performed well in respect to the hardened properties. Subsequently, the same mix was considered in order to study the influence of practicing curing methods. From the results it was concluded that although type of curing regime on strength development both in indoor and outdoor environment at early ages was not considerable but at the later ages the effect was considerable. Compressive strength of specimens subjected to sprinkling, burlap and plastic cover curing in outdoor environment are significantly affected than the corresponding specimens in indoor environment.

Influence of calcination temperature of impure kaolinitic clay on hydration and strength development of ultra-high-performance cementitious composite

Despite the recent considerable interest in sustainable supplementary cementitious materials, the effect of calcined impure clay on ultra-high-performance cementitious composite (UHPC) is insufficiently understood. In this study, three impure kaolinitic clays calcined at 600 °C, 800 °C, and 1000 °C were compared with quartz powder in terms of hydration reaction and strength development of UHPC. As a function of calcination temperature, the clays had different effects on the properties of UHPC. The clays calcined at 600–800 °C increased the initial strength of UHPC (≤3 days) by ∼10–35% but show lower strength by ∼5–9% after 28 days compared to reference sample. It is because the clays accelerated both cement hydration and pozzolanic reaction at an early age of the UHPC, but the premature consumption of water and pore refinement inhibited the long-term pozzolanic reaction. In contrast, the clay calcined at 1000 °C no longer affected the UHPC’s strength after increasing the 1st-day strength by 17%, since it acted as an inert filler after early age (>1 day). However, once heat treatment (at 90 °C for 48 h) was applied to UHPC, all of the clays did not express pozzolanic reactivity because the main initiative for the pozzolanic reaction shifted from metakaolin to silica fume. From these results, it is concluded that the use of calcined clays does not notably reduce the strength of UHPC, as long as impure clays with sufficient kaolinite content (>40%) are used.

CONCRETE PROPERTIES EVALUATED BY REPLACING CEMENT WITH ALCCOFINE

Nowadays, many research works are being conducted throughout the world to develop cementitious materials that can replace cement. As a replacement for cement in concrete, fly ash, silica fume, GGBS, Metakaolin, Micro materials, Quartz powder, etc. are tried out in that order. This experiment tries out a new ultrafine material called Alccofine for a partial replacement. This concrete grade, M40, was developed for testing the cementing efficiency of Alccofine with a variety of percentages of replacement of cement with Alccofine, such as 5%, 10%, 15%, and 20%. A design mix has been developed for M40 grade and cubes have been cast with varying percentages of alccofine, as described above. A discussion of the results has been provided. Compared to other mix percentages, 15% of alccofine replacement with cement produces good strength. The SEM images show that Alccofine is found to have good cementing efficiency in earlier ages of concrete.

Valorization of quartz powder for drying shrinkage and carbonation resistance of alkali-activated slag cement.

Alkali-activated slag (AAS) cement is one type of alkali-activated binders free from Portland cement. The main problems of this type of cement are its high drying shrinkage and low carbonation resistance that hinder its wide use. In the current paper, the authors tried to suppress this high drying shrinkage and enhance the carbonation resistance of this type of binder by incorporating quartz powder (QP). For that reason, slag was partially replaced with QP at ratios of 10-30 wt%. The flowability of each mixture was measured using a hand-driven flow table. The initial reading of drying shrinkage was monitored after 24h from casting and continued up to 90days. After initial curing, some specimens were exposed to atmospheric natural carbonation for one year, whilst the remaining specimens were sealed and used as references. Different techniques such as thermogravimetric analysis and its derivative (TGA/DTG), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) were used to analyze the results. The results showed that the incorporation of QP in the matrix increased the flowability and compressive strength, decreased the drying shrinkage, increased the carbonationresistance, and refined the microstructure.

Prediction on Flexural strength of High Strength Hybrid Fiber Self Compacting Concrete by using Artificial Intelligence

The primitive focus of this research work is about the artificial intelligence methods engaged for creating an outlook for flexural strength of High Strength Hybrid Fiber Self Compacted Concrete (HSHFSCC), which is considered to be a special concrete in order to tackle both workability and durability without disturbing the strength of the concrete. It possesses not only the good deformability during fresh state but also put forward high aversion to segregation resulting in superior homogeneity and increase in productivity by altering the period of construction. While incorporating various fibers like glass, steel, carbon, synthetic, and quartz powder in plain concrete, directs in the enhancement of post-cracking, toughness, ductility and limits the detrimental effect of shrinkage. The current work is classified into two stages. 1) Development of HSHFSCC and High Strength Self Compacting Concrete (HSSCC). 2) Engaging different Machine Learning (ML) models to divide the obtained information into Train, Test and Validation followed by 19 types of different ML regression models accompanied with Artificial Neural Network for engaging the function to appropriate the flexural strength of HSHFSCC and HSSCC. The boundary conditions discussed as input includes Setting time, percentage of quartz and river sand. Total 25 number of datasets are used for 5-fold cross validations by adopting MATLAB ML and Deep learning toolkit and Python is adopted to validate the optimized models. The evaluation factors like R-square and Root mean square show a great level of accuracy and reliability of the model.

Improving the Performance of Structural Members by Incorporating Incinerated Bio-Medical Waste Ash in Reinforced Geopolymer Concrete

This study aims to analyze the use of Incinerated Bio-Medical Waste Ash (IBWA) in reinforced concrete structural member with ground granulated blast furnace slag (GGBS) as an alternate building ingredient instead of cement. Biomedical waste was produced from various medical resources such as hospitals, medical institutes and research centres. GGBS is the waste generated from the steel plant. The climate is now being affected by the release of CO2 (global warming) from the Portland cement industries. Therefore, greater attention must be paid to study efforts to use geopolymer concrete. Geopolymer is a novel inorganic eco-friendly binding agent derived from an alkaline solution that stimulates aluminosilicate source material (GGBS, Rice Husk Ash, Quartz Powder, metakaolin, fly ash and Silica Fume). In this research, laboratory tests for Reinforced Geopolymer Concrete (RGPC) beams (deflection, ductility factor, flexural strength and toughness index) and columns (load-carrying ability, stress-strain behaviour and load-deflection behaviour) were conducted for three types of proportions using [30% IBWA – 70% GGBS Geopolymer concrete, GGBS Geopolymer concrete and Reinforced Cement Concrete. The experimental findings revealed that the performance of reinforced 30% IBWA – 70% GGBS geo-polymer beams and columns worked more effectively than reinforced cement concrete beams and columns.

Investigations of Model Multilayer Ceramic Casting Molds in a Raw State by Nondestructive Methods.

This article presents the results of research on the use of modern nondestructive methods such as 3D scanning, thermography and computed tomography (CT) to assess the quality of multilayer ceramic molds. Tests were performed on spherical samples of multilayer ceramic molds in the raw state. Samples were made of molding sands composed of quartz and molochite powders, the alcoholic binder hydrolyzed ethyl silicate (ZKE) and an aqueous binder based on colloidal silica. Thickness measurements of spherical forms were made using a 3D scanner. Porosity measurements were made using CT. Additionally, thermography observations of the mold cooling process were made with controlled temperature and humidity. The results of temperature measurements of samples were compared with measurements of thickness and porosity. The practical goal was to determine the possibility of using thermography, 3D scanning and CT as a quick method for detecting mold defects by varying their thickness, porosity and cracks and for final verification of the ceramic molds’ condition before casting.

Complex optical properties of polymeric composite materials mixed with quartz powder and investigated by THz time-domain spectroscopy

With the rapid development of terahertz (THz) technology comes the need to further explore the prospects for various applications of THz systems. Due to the strong need, components and equipment involving the exploration are indispensable. In order to find the most suitable material for THz technology, we selected three common materials for different 3D printing techniques—polyamide (PA), polylactic acid (PLA), and light-curable resin. After mixing each material with a quartz powder of a different weight percentage, we observed the change in absorption coefficients and refractive indices of the mixtures by THz time-domain spectroscopy (THz-TDS). The higher the ratio of a quartz powder to a mixture was, the smaller the absorption coefficient of the mixture would be. The optimum rate of change in the absorption coefficient was attained when the weight percentage of a quartz powder in a mixture was 50 wt%. At 1 THz of the measurement of THz-TDS, the average reduction in the absorption coefficients of the three different materials mixed respectively with a 50 wt% quartz powder was 39.17%. Besides reduced absorption coefficients, the mixtures’ refractive indices also changed as the weight percentage of a quartz powder in the mixtures varied. The PLA-based sample mixed with a 50 wt% quartz powder had the highest increase in the refractive index. Mixing quartz powders with materials, therefore, is an effective method to increase refractive indices and decrease absorption coefficients. The method can be applied in 3D printing techniques in the future to enhance the efficiency of THz components manufactured with 3D printing techniques.