Higher Compressive Strength Values Research Articles

Mechanical Characteristics Of Concrete With The Addition Of Integral Waterproof Using Local Aggregate East Kalimantan

Nowadays, there are various ways to deal with leaks in concrete. One way that is often used to deal with leaks is to provide a waterproofing or waterproofing layer on the surface of the floor or wall. Along with technological developments, research on the quality of concrete waterproofing continues to be improved. One of them is the use of Concrete Integral waterproofing, which is a mixture of concrete that is added with integral waterproofing to minimize water penetration into the concrete, thereby increasing the concrete’s impermeability and protecting the concrete against leakage. The purpose of this study was to determine the effect of adding Integral waterproofing to the compressive and tensile strength of concrete and to determine the optimum level of addition of Integral waterproofing. The aggregates used are Palu coarse aggregate and Kalimantan local fine aggregate to utilize the natural resources in East Kalimantan. Addition of Integral Waterproofing into the concrete mixture with a percentage of 0%, 0.5%, 1% and 2% of the cement weight. Concrete testing was carried out at the age of 28 days by testing its mechanical properties, namely compressive strength and tensile strength. Based on research results, for concrete that uses Mahakam fine aggregate, the highest compressive strength value at 2% addition is 34.73 MPa, and the highest tensile strength value at 2% addition is 2.38 MPa. And for concrete that uses Sambera fine aggregate, the highest compressive strength value at 2% addition is 30.91 MPa, and the highest tensile strength value at 1.5% addition is 2.34 Mpa.

The Effect of Calcium Carbonate (CaCO3) and Polystyrene (PS) Composition on Contact Angle and Compressive Strength of Hydrophobic Cement Mortar

In the building there are several elements such as pillars, floors and walls. The wall is the outermost part of the building that directly receives changes in weather such as rain. As a result, the walls of the building are easily fragile and make the walls damaged. To reduce damage, it is necessary to test cement that is resistant to water (hydrophobic) so that the walls of the building are not easily damaged by water and durable with the help of hydrophobic agent additives in the form of CaCO3 and polystyrene. The purpose of this study was to investigate the effect of variations in the composition of CaCO3/polystyrene on the contact angle of the hydrophobic layer and the compressive strength of portland cement. Precursors were made by varying the composition of CaCO3 1%, 2%, 3% and polystyrene/tetrahydrofuran 1:0,065; 2:0,065; 3;0,065 and the calcination temperature used was 60°C using an oven. The optimum contact angle measurement results were obtained at the composition variation of CaCO3 3% and Polystyrene 3:0.065, which was 114.986° and the highest compressive strength value was at variations in the composition of CaCO3 1% and Polystyrene 3:0,065, which was 238.10 kg/cm2.

Effects of Torrefaction Temperature on the Characteristics of Betung (Dendrocalamus asper) Bamboo Pellets

The objective of this study was to evaluate the effects of torrefaction temperature on the physical and mechanical properties of betung bamboo (Dendrocalamus asper) pellets. Torrefaction was conducted in an electric furnace at 200°C, 240°C, and 280°C for 50 minutes. The physical properties evaluated included color change, density, moisture content, water resistance, and water adsorption. The mechanical properties were also investigated by compressive strength test. The result showed that torrefaction affected the color properties of betung bamboo pellets with ∆E values of more than 12 or totally changed. The density and moisture content of torrefaction bamboo betung pellets decreased with increasing torrefaction temperature. The results also showed that the hydrophobic properties of the bamboo betung pellets improved with the increased of torrefaction temperature. The highest compressive strength value was obtained by bamboo betung pellets torrefied at 200°C and the values decreased with the increase of temperature. In conclusion, there were differences in the physical and mechanical properties of bamboo betung pellets that were torrefied at different temperatures. Torrefaction with an electric furnace effectively improved the quality of betung bamboo pellets. Keywords: Bamboo betung, pellets, temperature, torrefaction

Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed

In this work, an investigation on the use of two slags from different origins (electric arc furnace slag (EAFS) and copper slag (CS)) as raw materials in the manufacture of alkali-activated cements has been carried out. A comparison of the different mechanical properties developed by the alkaline activation of each raw material has been studied. Combination of 35 wt% potassium hydroxide (KOH) solution with different concentration (5, 8, 12 and 15 M) and 65 wt% potassium silicate (K2SiO3) solution was used as activating solution to manufacture alkali activated cements. The pastes were cured 24 h in a climatic chamber at 20 °C at 90% of relative humidity, subsequently demoulded and cured at same condition during 1, 7, 28 and 90 days. Alkali activated materials have been characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The physical properties: bulk density, water absorption and apparent porosity, mechanical properties, flexural strength and compressive strength and thermal properties: thermal conductivity have been determined. The results indicate that two types of slags studied are a suitable source of aluminosilicates that can be activated for the manufacture of alkali-activated materials. These precursors are capable of developing high values of flexural and compressive strength and low values of thermal conductivity when optimal concentration of KOH was used. The optimal composition was developed when CS was utilized. Binders with CS and 12 M M ratio achieved compressive strength values up to 70 MPa.

Experimental Study of Using Rice Husk Ash and Borax on The Compressive Strength of Geopolymer Concrete

The development of infrastructure in Indonesia is currently very increasing, The use of concrete is widely used to build dams, buildings, roads, bridges and others. Concrete is used because it has advantages over other materials, apart from having compressive strength, concrete is also a relatively inexpensive material. However, the increasing amount of cement used in the manufacture of concrete will cause an increase in global warming. Thus, geopolymer concrete was introduced as an alternative to reduce cement consumption in concrete work. The purpose of this study was to determine the effect of using rice husk ash and borax as an alternative material on the compressive strength of concrete and to determine the effect of using rice husk ash and borax as an alternative material to slow the setting time of geopolymer concrete. The variations in the use of rice husk ash 0%, 10%, 15%, and 20% with the use of 3% borax. From the results of the study, the use of rice husk ash and borax in the geopolymer concrete mixture had an effect on the compressive strength of concrete in this study, with the addition of rice husk ash there was a decrease in compressive strength when compared to normal geopolymer concrete or without a mixture of rice husk ash and borax. The use of 15% rice husk ash and 3% borax achieved the highest compressive strength values when compared to the use of rice husk ash as much as 10% and 20%. Furthermore, the more the use of rice husk ash with the use of 3% borax, the longer the setting time in geopolymer concrete.

Efek suhu sintering dan komposisi bahan terhadap karakteristik mekanik komposit berbahan limbah aluminium dan kaca menggunakan metode metalurgi serbuk

The waste has been a big problem for human and environment and has become a hot issue until recently. One of the wastes that we often encounter is aluminum waste. Aluminum waste can indeed be re-melted, but the results of the smelting will produce even more dangerous waste, namely Toxic Hazardous Material) waste. In addition to aluminum waste, there is also a lot of waste that we encounter in our daily lives, namely glass waste. This study aims to maximize the potential of aluminum waste and glass waste by examining the effect of variations in sintering temperature and material composition on the hardness and compressive strength of the composite. This research is started by crushing the solid material into the mesh of 100, the next stage is mixing the powder and then print it with 7 tons pressure load. The last step is sintering the specimens at temperatures of 390oC, 490oC, and 590oC with 60 minutes holding time. The results show that the highest hardness value is 60 HRF and the highest compressive strength value is 235.59 MPa. Macrostructure observation shows that there is greater porosity in the specimen with lower mechanical properties. Variation of sintering temperature has a directly proportional effect on the hardness and compressive strength values. Variation in the composition of material gives an inversely proportional effect on the two tests of mechanical properties when viewed from the percent addition of glass powder.

Behavior of Built-Up Cold-Formed Steel Stub Columns Infilled with Washed Bottom Ash Concrete

The main objective of the study is to determine the behavior of built-up cold-formed steel (CFS) stub columns infilled with washed bottom ash (WBA) concrete and also their failure mode. Five proportions of WBA as sand replacement in concrete and five specimens of built-up CFS stub columns infilled with WBA are produced in this study. There are four parts of the testing conducted: material properties of CFS, material properties of WBA concrete, mechanical properties of the connection, and mechanical behavior of built-up CFS stub columns. The result shows that the specimen with 25% WBA is reported to have the highest value of compressive strength in the material properties of WBA concrete and the mechanical behavior of built-up CFS stub column. The percentage difference of the ultimate load of the built-up CFS column filled with normal concrete and filled with WBA concrete is noted to have a range of 3% to 25%.

Influence of 3D Printing Parameters on the Mechanical Stability of PCL Scaffolds and the Proliferation Behavior of Bone Cells

Introduction The use of scaffolds in tissue engineering is becoming increasingly important as solutions need to be found for the problem of preserving human tissue, such as bone or cartilage. In this work, scaffolds were printed from the biomaterial known as polycaprolactone (PCL) on a 3D Bioplotter. Both the external and internal geometry were varied to investigate their influence on mechanical stability and biocompatibility. Materials and Methods: An Envisiontec 3D Bioplotter was used to fabricate the scaffolds. First, square scaffolds were printed with variations in the strand width and strand spacing. Then, the filling structure was varied: either lines, waves, and honeycombs were used. This was followed by variation in the outer shape, produced as either a square, hexagon, octagon, or circle. Finally, the internal and external geometry was varied. To improve interaction with the cells, the printed PCL scaffolds were coated with type-I collagen. MG-63 cells were then cultured on the scaffolds and various tests were performed to investigate the biocompatibility of the scaffolds. Results: With increasing strand thickness and strand spacing, the compressive strengths decreased from 86.18 + 2.34 MPa (200 µm) to 46.38 + 0.52 MPa (600 µm). The circle was the outer shape with the highest compressive strength of 76.07 + 1.49 MPa, compared to the octagon, which had the lowest value of 52.96 ± 0.98 MPa. Varying the external shape (toward roundness) geometry, as well as the filling configuration, resulted in the highest values of compressive strength for the round specimens with honeycomb filling, which had a value of 91.4 + 1.4 MPa. In the biocompatibility tests, the round specimens with honeycomb filling also showed the highest cell count per mm2, with 1591 ± 239 live cells/mm2 after 10 days and the highest value in cell proliferation, but with minimal cytotoxic effects (9.19 ± 2.47% after 3 days).

Investigation of the Effect of Plasticizer Additive Ratio on the Abrasion Resistance of Concretes

In today's technology, there are various chemical additives that shape the fresh or hardened properties of concrete. Chemical additives can be added alone or by using several additives together in order to obtain the desired concrete properties. Usage dosages are chosen in such a way that they can meet the desired performance criteria and at the same time do not impair the fresh and hardened qualities of the concrete. In this study, physical, mechanical and durability properties of concretes produced by using chemical additives in different proportions were investigated. In the production of concrete samples, the water / cement ratio and cement amount were kept constant at 0.5 and 350 kg / m3, respectively. 0-4mm grain size crushed sand and 4-16 mm grain size aggregate are used as aggregate. The plasticizer used as a chemical additive was added at the rate of 0.5%, 1%, 1.5% and 2% depending on the amount of cement. Concrete samples of 150x150x150 mm for compressive strength, archimedes weighing and 71x71x71 mm for abrasion tests were produced for use in experimental studies. After the concrete samples have been removed from the mold, they have been cured in the standard curing pool at a temperature of 20 ± 2 ° C for 7 and 28 days. Concrete samples have been subjected to archimedes, capillary water absorption, ultrasound transition rate, boh (wear), schmidt and compressive strength tests. The compressive strength of 7 and 28 days old concrete samples was determined. Physical properties such as water absorption percentage, porosity, unit weight, ultrasound transition rate, and weight losses in the wear test were measured only for samples of 28 days. The values with the lowest water absorption and porosity percentages were seen in the sample containing 1% plasticizer additive as 3,18% and 9,32% respectively. Ultrases transition velocity, schmidt test hammer and the highest compressive strength values were observed in the 28-day sample containing 1% plasticizer additive as 4901 m/s, 26.1 and 57,14 MPa, respectively. With the increase of the chemical additive ratio, weight losses due to wear have decreased.

Hybrid Cements with ZnO Additions: Hydration, Compressive Strength and Microstructure.

The effect of ZnO has already been studied for Portland cement, but the study of its impact on hybrid pastes is scarce. Thus, in this investigation, the influence of ZnO addition on hydration, compressive strength, microstructure, and structure of hybrid pastes is presented. The analyses were made by setting time tests, compressive strength tests, X-ray diffraction, Fourier-transform infrared spectroscopy, thermogravimetric analysis with differential scanning calorimetry, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. The results indicate that the setting time of the cements was delayed up to 39 min with additions of 3 wt% ZnO. Alternatively, the higher values of compressive strength were observed when 0.5 wt% ZnO was added to the cements for all curing days. In addition, no important differences in the microstructure of samples with different additions of ZnO were observed after 28 days of curing. It is expected that the use of ZnO contributes to the delay of the setting time and the increase of the compressive strength without negatively modifying the microstructure of hybrid pastes.

Hydrothermal synthesis and spark plasma sintering of NaY zeolite as solid-state matrices for cesium-137 immobilization

Hydrothermal synthesis of NaY-type zeolite was carried out and the effect of temperature on the phase composition, crystal structure, textural characteristics, particle size and morphology, as well as sorption properties to Cs+ ions was studied. Solid-state matrices based on NaY zeolite the Faujasite structure containing 26.1 wt% cesium were obtained by spark plasma sintering (SPS) with high values of compressive strength (to 132.9 MPa) and Vickers microhardness to HV~ 698, Fracture toughness (K1c) ~ 1.26 MPa m1/2. The kinetics of ceramic matrices consolidation, phase composition and morphology using dilatometric studies, XRD, and SEM were studied. The thermogravimetric analysis shown the high thermal stability of the obtained samples up to 1300 °C. The high hydrolytic stability of CsAlSiO4 ceramic was proven (leaching rate of 2.33 ×10−8 g·cm−2·day−1 and cesium diffusion coefficient De 1.41 ×10−13), which exceeds the requirements of GOST R 50926–96 and ISO 6961:1982 for solid-state matrices.

NONLINEAR SIMULATION ANALYSIS OF MECHANICAL BEHAVIOUR OF RUBBERIZED CONCRETE

The main objective is to simulate the representation of rubber concrete with different percentages (0, 20, 40, 60, 80, 100%) of rubber using a finite element approach with ANSYS V.15 software to evaluate the behavior of concrete under the influence of mechanical force by using a standard cylinder to calculate its compressive strength, elasticity modulus and displacements for comparison with the previous experimental study, which showed a very close agreement of 5 to 12% when compared between them. The results showed that when the percentage of rubber increases, it leads to a decrease in the compressive strength, that is, its resistance, and an increase in the corresponding displacements and deformations that occur in them, as a result of the concentration of these stresses in the rubber limits. The results also showed that the meshing distribution of the analyzed elements by the ANSYS gave higher values of compressive strength and a decrease in the corresponding displacements when they were regular i.e. homogeneous compared to the irregular ones. Finally, through statistical analysis, it was found that the mean and arithmetic mean were acceptable and close when comparing the theoretical and practical results.

Synthesis of amorphous KAlSi3O8 for cesium radionuclide immobilization into solid matrices using spark plasma sintering technique

An effective sorption material for cesium radionuclides immobilization in highly safe and reliable solid-state matrices was proposed. Prepared aluminosilicate (КAlSi3O8) adsorbent had amorphous mesoporous structure and Cs+ ions sorption capacity of ∼3.7 mmol/g. The physical-chemical characteristics of (Cs, К)AlSi3O8 sample saturated with Cs + ions were studied using XRD, FT-IR, SEM-EDX, and DTA-TG methods. Firstly, solid-state aluminosilicate matrices were obtained using spark plasma sintering (SPS) technology with high values of relative density (up to 99.9%), compressive strength (31.3–79.2 MPa), and Vickers microhardness (0.9–5.3 GPa). The sample obtained at 1000 °C had a low value of Cs+ leaching from matrices (RCs within the range of 10-7 g cm-2·day-1) and cesium diffusion coefficient (De 9.07 × 10-14 cm2/s). It was shown that prepared aluminosilicate cesium matrices comply with regulatory requirements of GOST R 50926-96 and ANSI/ANS 16.1.

One-Step Sintering Process for the Production of Magnetocaloric La(Fe,Si)13-Based Composites

A one-step sintering process was developed to produce magnetocaloric La(Fe,Si)13/Ce-Co composites. The effects of Ce2Co7 content and sintering time on the relevant phase transformations were determined. Following sintering at 1373 K/30 MPa for 1–6 h, the NaZn13-type (La,Ce)(Fe,Co,Si)13 phase formed, the mass fraction of α-Fe phase reduced and the CeFe7-type (La,Ce)(Fe,Co,Si)7 phase appeared. The mass fraction of the (La,Ce)(Fe,Co,Si)7 phase increased, and the α-Fe phase content decreased with increasing Ce2Co7 content. However, the mass fraction of the (La,Ce)(Fe,Co,Si)7 phase reduced with increasing sintering time. The EDS results showed a difference in concentration between Co and Ce at the interphase boundary between the 1:13 phase and the 1:7 phase, indicating that the diffusion mode of Ce is reaction diffusion, while that of Co is the usual vacancy mechanism. Interestingly, almost 100 % single phase (La,Ce)(Fe,Co,Si)13 was obtained by appropriate Ce2Co7 addition. After 6 h sintering at 1373 K, the Ce and Co content in the (La,Ce)(Fe,Co,Si)13 phase increased for larger Ce2Co7 content. Therefore, the Curie temperature increased from 212 K (binder-free sample) to 331 K (15 wt.% Ce2Co7 sample). The maximum magnetic entropy change (−ΔSM)max decreased from 8.8 (binder-free sample) to 6.0 J/kg·K (15 wt.% Ce2Co7 sample) under 5 T field. High values of compressive strength (σbc)max of up to 450 MPa and high thermal conductivity (λ) of up to 7.5 W/m·K were obtained. A feasible route to produce high quality La(Fe,Si)13 based magnetocaloric composites with large MCE, good mechanical properties, attractive thermal conductivity and tunable TC by a one-step sintering process has been demonstrated.

Investigations on Flexural and Compressive Strengths of Mortar Dedicated to Clinker Units—Influence of Mixing Water Content and Curing Time

The article presents laboratory tests on the impact of the mixing water content used in the preparation of fresh mortar on the flexural and compressive strength of one of the dry-mix mortars produced by a leading European producer and dedicated to bricklaying with clinker elements. The development of these parameters in relation to curing time was also analyzed. The mortar samples were prepared from a factory-made mortar mix using 4.0 L (the value recommended by the mortar manufacturer), 4.5 L, and 5 L of water per 25 kg bag of ready-made, pre-mixed dry mortar mix. All samples were tested in five series after 5, 9, 14, 21, and 28 days of sample curing. The results of these tests showed that the use of 6 and 18% more mixing water than recommended by the manufacturer (4.5 and 5 L per bag) adversely affected the basic mechanical parameters of the tested mortar. Moreover, it was found that the highest compressive strength values were obtained after 21 days of curing and not after 28 days as usual. It was also found that hardening time and higher than recommended water content adversely affected the bending strength of the mortar.

Non-destructive test analysis on concrete with rice husk ash and crushed stone additives

Well-designed and durable structures play an important role in attaining sustainable infrastructure. However, sometimes due to severe atmospheric conditions such as heat, moisture, chemical attack, other environmental factors, these structures start to deteriorate over a period. To determine the extent of damage to the structure, various tests and structure health monitoring methods have been developed. These tests help in the timely indication of deterioration and maintenance and monitoring of the structure. This paper presents the Non-Destructive Test (NDT) analysis on the novelty developed Rice Husk Ash (RHA) and Crushed Stone (CS) added concrete. RHA was added as a partial replacement of cement in the proportion varying from 5 % to 25% and CS was added in the proportion varying from 20% to 100% as a replacement of sand. Rebound hammer and Ultrasonic Pulse Velocity (UPV) test were performed to check the compressive strength of concrete after 28 and 84 days. The test results were compared with conventional concrete (CC), and it was found that the addition of RHA up to 15% and CS up to 80% replacement gives higher values of compressive strength. For optimum content, the value of rebound number is 18.4% higher for 84 days duration as compare to CC. The value of UPV and rebound number for all the series was higher as compare to that of CC.

Effect of admixed chloride and molarity of NaOH solution on early-age strength and reinforcement corrosion in FA/GGBS geopolymer concrete

Chloride persuaded steel reinforcement corrosion is an important durability issue in concrete structures. In this present study, the corrosion of reinforcing steel was evaluated in 0% and 3% sodium chloride admixed fly ash (FA)/ground granulated blast furnace slag (GGBS) GPC mixes. Two different molarities of NaOH solution i.e. 8 M and 10 M were used for preparing the GPC mixes with FA/GGBS proportions of 100/0 (wt.%), and 70/30 (wt.%). Reinforced geopolymer concrete prismatic specimens were prepared for half-cell potential and linear polarization resistance (i.e. LPR) measurements after 28 days and 180 days of its manufacturing. The obtained results showed that the early age 7 days compressive strength of GPC mixtures reduced with the existence of NaCl. The higher value of compressive strength was detected in GPC prepared with FA/GGBS proportion of 70/30 as compared to that made with FA/GGBS proportion of 100/0. Further, GPC made with higher molarity (10 M) of NaOH solution showed greater strength than that made with lower molarity (8 M) of NaOH solution. The less negative half-cell potential value and lower corrosion current density (Icorr) value of steel reinforcement in GPC was observed at the later age i.e., at 180 days in all GPC mixes as compared to 28 days. The higher chance of rate of corrosion, and the higher Icorr of steel reinforcement was detected in 3.0% NaCl added geopolymer concrete. Further, more negative half-cell potential and higher Icorr of steel reinforcement were detected with a rise in molarity of NaOH solution in GPC made with FA/GGBS proportion of 70/30 at both ages (i.e. at 28 days and 180 days). However, mostly less negative half-cell potential and lower Icorr of reinforcing steel were detected with a rise in molarity of NaOH solution in GPC made with FA/GGBS proportion of 100/0 at both ages.

Gözenekli Agregalı Betonların Isıl ve Mekanik Özellikleri

The results of an experimental study on the thermal and mechanical properties of concretes using porous aggregates instead of conventional aggregates are presented in this study. Oriented at this purpose, eleven concrete samples containing organic sediment stones, volcanic stones and artificial porous aggregates were prepared as porous aggregates. The concrete samples were subjected to certain tests at the end of 28 days of drying period and their thermal and mechanical properties were determined accordingly. With this study, the following values were obtained: i) The lowest heat transfer coefficient for concrete with expanded polystyrene aggregates from the group of artificial porous aggregates: 0.175 W/mK, ii) The highest compressive strength value is basalt-type stone (Karaca dag) from the group of volcanic stones: 117 MPa.

Experimental Investigation of Ultrasonic Pulse Velocity (UPV) Test Specimen in Assessing the Strength of Steel Fiber Reinforced Concrete Structure

This study aims to conduct the Ultrasonic Pulse Velocity (UPV) test and compressive strength test of Steel Fiber Reinforced Concrete (SFRC). This paper also examines the correlation of UPV test data and compressive strength test data for SFRC specimens. The experiments were carried out with the same value of the water-cement ratio, superplasticizer but different fiber volumes of steel fiber. Twelve prism sizes 100mm x 100mm x 500mm were casted and 0.5%, 1.0%, and 1.5% of steel fiber reinforced concrete were added and the prisms undergone curing for 7, 14 and 28 days. The highest value of the UPV test at the x-axis is SFRC-0.5%, 6.26 km/s at seven days and 6.8377 km/s at 14 days. The highest value of the UPV test at the y-axis is SFR-0.5%, 6.68 km/s at seven days and 6.34 km/s at 28 days. Nevertheless, the grading is still considered excellent concrete quality based on BS1881. The highest value of compressive strength is SFRC-1.0%, 193.2 MPa at 14 days. The R-squared value for the correlation coefficient between UPV result and the compressive strength result at the x-axis and y-axis is 0.9963 and 0.9966 respectively. The non-linear models show high regression coefficient of R-squared close to 1.00, which means the parameters are strongly correlated. The correlation equation obtained can be used to predict compressive strength based on UPV data for steel fiber volume fraction up to 1.5%. Thus, it can be concluded that percentage of steel fiber added, affect the strength of the tested concrete specimens and the optimized value of steel fiber added is at 1% in this study.

Effects of kaolin characteristics on the mechanical properties of alkali-activated binders

The present study examines the potential use of six Kaolin samples collected from different deposits to produce calcined kaolin-based alkali-activated binders. The samples were initially characterized to assess their chemical compositions and reactivity through x-ray fluorescence (XRF), x-ray diffraction (XRD), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and Chapelle-test. Mortar specimens were prepared for measuring the hydraulic activity as well as the compressive strength. The chemical analysis of the Kaolin showed a wide range of Al2O3 content (7.4–28.9 wt%), whereas the difference in the SiO2 was minor. Chapelle test results reflected the quality of the Kaolin used in this investigation, with values ranging from 350 to 700 mg/g. All Kaolin samples exhibited clay-based crystalline compounds that disappeared after calcination and converted to amorphous phases. A wide range of compressive strength values was obtained for the resultant alkali-activated binder (15–40 MPa) at 90 days. Direct correlations were found between calcined kaolin characteristics and the 90-days compressive strength of the alkali-activated binder. Kaolin samples with high pozzolanicity and higher Si/Al ratio were found to be more pronounced to produce alkali-activated binder with higher compressive strength values. Higher Fe and Al contents in the calcined Kaolin were found to lower the compressive strength of the alkali-activated binder.