Fast Hardening Research Articles

Investigating the interfacial vertical shear behavior of BFPMPC mortar and cement concrete with pothole repair

Magnesium phosphate cement (MPC) has both traditional cement properties and ceramic properties with fast setting and hardening characteristics. To rapidly reopen traffic and extend its service life, MPC has been widely used in the rapid repair of highway and airport cement concrete pavement. This study utilizes basalt fiber-reinforced polymer-modified magnesium phosphate cement (BFPMPC) developed in previous research to rapid repair the typical potholes on cement concrete pavement, aims to reveal the interface properties between BFPMPC mortar and cement concrete and further investigate the underlying mechanisms for such properties. Firstly, the optimal mixture ratio was determined by orthogonal test design. Then, the shear strength of the repair interface was measured by composite BFPMPC mortar and cement concrete specimens. The mechanical characteristics of the repair interface and the microscopic mechanism were characterized by nano-indentation technology and SEM/EDS. Finally, the interface constitutive model was established by DIGIMAT and finite element model was developed to simulate the interface failure. Results showed that the no new hydration products were produced by the addition of polymer in BFPMPC. BFPMPC matrix became denser with the increase of age, resulting in the better bonding between fiber and paste. The interface vertical shear strength at 6 h and 3 d were 3.1 MPa and 3.9 MPa, respectively. SEM/EDS results showed that polymer has a certain self-healing ability to decrease the crack width with increase of curing age, and a variety of inclusions in the repair interface were observed. The elastic modulus of each inclusion phase can be effectively analyzed by nanoindentation. The simulation results showed that the pressure on upper surface of BFPMPC mortar transfers to the bottom through the repair interface. As the tensile stress on the bottom over the maximum interface tensile stress, the cracks were extend from the bottom to upper, then the structure was failed. Interface vertical shear strength of numerical simulation was, respectively, 3.149 MPa and 3.957 MPa. It is close to the plain shear strength experimental value, validating the proposed interface constitutive relationship.

Influence of interface agent and form on the bonding performance and impermeability of ordinary concrete repaired with alkali-activated slag cementitious material

Alkali-activated slag cementitious materials (AASCMs) exhibit fast hardening, early strength development, high strength, and low carbon content, making them suitable for repairing damaged concrete. However, the bonding performance of the repaired interface and the impermeability of the repaired specimens require further evaluation. Accordingly, this study performed splitting tensile, water penetration, chloride ion penetration, and microanalysis tests on ordinary concrete specimens repaired with AASCMs. The results demonstrated that epoxy resin and cement mortar improved the interfacial bonding strength, water permeability, and chloride ion permeability of the alkali-activated slag cementitious material-Portland cement (AASCM-PC) specimens. The rectangular mortise joint and S-shaped interface improved the interfacial bonding strength and water permeability of the AASCM-PC specimens but slightly reduced their chloride ion permeability. Compared with ordinary concrete, AASCM has fewer harmful voids and denser microstructure, improving the impermeability of the repaired specimens.

Optimization of mechanical property and microstructure for magnesium phosphate cement-based canvas using borax

As a type of excellent rapid protective material with fast hardening and high early strength characteristics, magnesium phosphate cement (MPC) is used as the cementitious material to fabricate concrete canvas. For a thick MPC canvas, sufficient hydration reaction is crucial in keeping its integrity. Borax is used to adjust the hydration progress of MPC in warp-knitted fabrics. The effects of different borax contents (0 %, 1 %, 2 %, 3 %, 4 %, 5 %, 6 %) on the compactness of reaction products and the mechanical properties of MPC canvas are evaluated. In addition, SEM, XRD, hydration heat, and X-CT are used to systematically analyze the hydration morphology, products, exothermic process, and pore structure of MPC canvas. The results show that borax can effectively delay the setting time of MPC, addressing the issue of incomplete hydration of MPC powder in thick canvas. The 4 % borax content (B4 sample) can ensure the complete reaction in a 20 mm thick MPC canvas, achieving the maximum compressive and flexural strengths of 26.37 MPa and 4.9 MPa at 7 d, respectively. Borax effectively optimizes the pore structure of MPC canvas and achieves a dense bond at the interface between MPC and the canvas fabric with the minimum porosity of 11 % in the B4 sample. Therefore, borax is crucial for ensuring the structural integrity of MPC canvas.

Use of metakaolin with a low surface area and rich in quartz and iron as a precursor in the production of structural alkali-activated concrete

Pumpable and machineable alkali-activated structural concretes are made using low-reactivity metakaolin with high quartz and iron contents. The effects and interaction of alkaline concentration (NaOH - 8, 10, 12, 14, and 16 M) and ratio of alkaline reagents (Na2SiO3/NaOH - 1.0, 1.5, 2.0, 2.5, and 3.0) on their properties were accessed using 2k complete factorial design. Higher concentrations of alkaline solutions resulted in faster hardening, decreased material deformation, and increased mechanical strength, with higher elastic modulus, lower damping, lower water absorption, and porosity. With time, the elastic modulus increased, and the dynamic damping decreased, suggesting the homogeneous formation of alkaline-activated products, confirming the proper configuration of the hardening process. The factorial design allowed for determining the ideal dosage for producing the material, indicating that the alkaline concentration (NaOH) should be 10 M and the Na2SiO3/NaOH ratio should be 2.5. They analyzed the possible combinations that allowed obtaining a material with adequate characteristics for the structural application.

A study on particle size of slag on properties of magnesium potassium phosphate cement

AbstractMagnesium potassium phosphate cement (MKPC) presents a broad application prospect in engineering fast repairing, reinforcement, hazardous material, and national defense construction, due to its good properties such as fast hardening and early strength, high bonding strength, and wide environmental adaptability. In this work, the effect of slag with different particle size on the workability, mechanical properties, and hydration products of MKPC was investigated. The results showed that the compositions of slag in the particle size range 75–300 µm are quite different. A decrease in the particle size of slag resulted in reduction of the fluidity of MKPC from 175 to 108 mm and shortening the setting time from 1300 to 850 s. The compressive strength of MKPC (curing for 3 h) does no change much as the particle size of slag varies, and slag with the particle size in the range of 115–300 µm slightly increase the 3‐h‐compressive strength of MKPC, since the compressive strength values are in the vicinity of 13 ± 2 MPa. As the curing age increases, physical effect and hydration activity of slag concurrently dominate the mechanical properties of MKPC, and when the hydration activity of the slag exceeds the adverse effect caused by fine particles, the compressive strength increases. Slag particle size can significantly improve the long‐term compressive strength of MKPC, which can effectively reduce the cost and can be used as a repair material with better durability.

Environmentally friendly concrete material with early strength and fast hardening using coal as an aggregate: a case for supporting empty roadways

In order to facilitate ventilation or transportation, many coal mines usually excavate an empty roadway in the middle of the mining working face. Under the influence of mining pressure, empty roadways are easily damaged, seriously threatening coal mines’ safety. Because the traditional support method of the empty roadway has the problems of low efficiency, high cost, and low strength, this paper researches the coal-based concrete support material with better effect. The grading test of coal aggregate was carried out, and it was found that the percentage of small-size aggregate greatly influenced the reduction of aggregate porosity in the stacked state. To solve the problems of the high cost of strengthening support methods such as high water material support in empty roadways, which could be more conducive to recovery and reduce coal quality. The research on empty roadways supports concrete material with coal as aggregate, making the working face recover coal resources safely and efficiently. The optimum gradation test of the total is to enhance the strength of support and solve the problem of low power and difficult cementation of coal. Based on the hydration analysis of cementitious material, the coal-based concrete, mainly composed of low-cost slag, is determined. The cementitious material with simple composition, rapid setting, and fast hardening was found. It is proved that the mechanical properties and molding effect of coal-based concrete support composed of gypsum, GGBFS, and clinkercement are better than those of commercial cement. The structural model of “surrounding rock-empty roadways-coal pillar-support” is established. The calculation method and check basis of empty roadways support resistance N1 are obtained. The results of industrial application verified that coal-based concrete could effectively protect empty roadways without affecting the productivity of coal mines.

Research on reactivity evaluation and micro-mechanism of various solid waste powders for alkali-activated cementitious materials

Alkali-activated cementitious material (AACM) based on the utilization of solid waste is a new type of environmentally friendly inorganic material, which has the advantages of early strength, fast hardening, high strength, and better durability. The reactivity of solid waste powder is a key factor for its appropriate utilization in alkali-activated cementitious materials, necessitating a rational evaluation of its reactivity. The reactivity evaluation was conducted on various solid waste powders, including fly ash (FA), red mud (RM), recycled micro-powder (RMP), red brick powder (RBP), coal gangue powder (CGP), and cement kiln dust (CKD). The effects of NaOH concentration, weight ratio of water to solid waste powder (W/P) and curing humidity on the compressive strength were investigated，then the compressive strength under optimal conditions was determined based on response surface analysis. The compressive strength under optimal conditions was used to evaluate the reactivity of solid waste powders. Moreover, microscopic tests (e.g., XPS test, ICP test, and NMR test) were carried to evaluate the reactivity of the solid waste. The relative number of bridging oxygen (RBO) measured by the NMR method in conjunction with chemical composition analysis serves as an effective method for evaluating the reactivity of solid waste powders. The leaching rate of Silicon (Si) and Aluminum (Al) ions in the ICP method depended mainly on the NaOH concentration and the elemental content in the raw material. In addition, the binding energies of O1s, Si 2p, and Al 2p tested by the XPS method had no particular correlation with the compressive strength.

Dual-Setting Bone Cement Based On Magnesium Phosphate Modified with Glycol Methacrylate Designed for Biomedical Applications.

Magnesium phosphate cement (MPC) is a suitable alternative for the currently used calcium phosphates, owing to beneficial properties like favorable resorption rate, fast hardening, and higher compressive strength. However, due to insufficient mechanical properties and high brittleness, further improvement is still expected. In this paper, we reported the preparation of a novel type of dual-setting cement based on MPC with poly(2-hydroxyethyl methacrylate) (pHEMA). The aim of our study was to evaluate the effect of HEMA addition, especially its concentration and premix time, on the selected properties of the composite. Several beneficial effects were found: better formability, shortened setting time, and improvement of mechanical strengths. The developed cements were hardening in ∼16-21 min, consisted of well-crystallized phases and polymerized HEMA, had porosity between ∼2-11%, degraded slowly by ∼0.1-4%/18 days, their wettability was ∼20-30°, they showed compressive and bending strength between ∼45-73 and 13-20 MPa, respectively, and, finally, their Young's Modulus was close to ∼2.5-3.0 GPa. The results showed that the optimal cement composition is MPC+15%HEMA and 4 min of polymer premixing time. Overall, our research suggested that this developed cement may be used in various biomedical applications.

Study on the Influence of Shrinkage-Reducing Materials on the Volume Stability of Shotcrete with a Fluorine-Containing Alkali-Free Accelerator.

In contrast to ordinary concrete, shotcrete exhibits greater shrinkage deformation. The utilization of an aluminum fluoride alkali-free accelerator (AF) is prevalent in tunnel engineering, attributed to its economical nature and fast setting and hardening. Currently, there is a dearth of research on the volume stability of aluminum fluoride accelerators, and no relevant studies have been conducted on the application of shrinkage-reducing materials in shotcrete using an aluminum fluoride accelerator. With the use of an aluminum fluoride accelerator, the early strength of shotcrete is reduced, and the addition of a shrinkage-reducing agent (SRA) and super-absorbent polymer (SAP) can also lead to a further reduction in the early strength of concrete. Therefore, this study aims to investigate the influence of these two shrinkage-reducing materials (SRA and SAP) on the workability and mechanical properties of shotcrete. The primary focus of this research is to determine the better compensation effect of the two shrinkage-reducing materials. To accomplish this, the study focuses on assessing the setting time, compressive strength, and volume stability of shotcrete that has been mixed with an aluminum fluoride accelerator using SRA and SAP. Additionally, we also aim to explore the hydration and shrinkage compensation mechanism of these shrinkage-reducing materials on shotcrete by conducting a microscopic test analysis.

Effects of nano-silica modification on early age hydration process in winter construction of tunnel engineering

Fast hardening and high early strength are crucial factors for concrete used in tunnel construction in cold regions. The incorporation of nano-silicate has been found to be an effective method for improving the properties of cement-based materials at an early age. Thus, the objective of this paper is to investigate the nano-modification effects of different nano-silica contents on the hydration process, mechanical properties, and hydration products of cement cured in a low-temperature environment. The effects of various nano-silica concentrations, including 1%, 2%, 3%, and a high dose of 6%, on the properties of the concrete were investigated. According to the test results, the optimal quantity of nano-silica plays a crucial role in determining the properties of concrete. The effects of nano-silica on the hydration of C3A were found to dominate the cement hydration process at an early age. The incorporation of nano-silica led to a significant improvement in the dissolution rate of anhydrite and the reaction rate of the C3A renewal, which may be responsible for the gain in early strength of concrete. However, an excessive amount of nano-silica could negatively affect the hydration process of the alite and C3A, as evidenced by the total heat generated during the silica and aluminate reactions. The XRD patterns further confirmed these results.

Effect of PVA latex powder and PP fiber on property of self-compacting alkali-activated slag repair mortar

Alkali-activated slag (AAS) cement shows the characteristics of fast hardening and high early strength, which is particularly suitable for repair materials. However, its high brittleness, poor toughness and poor workability hinder its application. The effects of polyvinyl alcohol (PVA) latex powder and polypropylene (PP) fiber on the fluidity, mechanical properties including toughness and adhesive property of self-compacting alkali-activated slag repair mortar (SCARM) were studied. Their effects on the microstructure of SCARM were also studied. The results show that the addition of PVA is helpful to improve the workability. With the increase of PVA content, the 30 min fluidity increases greatly. The addition of PP reduces the fluidity of SCARM. The incorporation of PVA and PP can improve the mechanical property, toughness and adhesive property, especially when mixed together. PVA increases the compactness of SCARM. In addition, it also enhances the interface combination of PP and SCARM. The addition of PVA does not change the hydration products of AAS cement, but slightly increases the hydration degree.

Cement-based ductile rapid repair material modified with self-emulsifying waterborne epoxy

Ordinary silicate cement repair materials are slow to set and harden, have low early strength, and cannot meet the demands of rapid repair, and the disadvantage of brittleness after repair is obvious. Calcium sulfoaluminate cement (CSA) is more suitable for use as a cementitious material for rapid repair materials due to its fast hardening and early strength characteristics, but this cementitious material still suffers from low bond strength and poor toughness, which cannot be effectively resolved. In recent years, polymer-modified cementitious materials have attracted a great deal of attention in the field of repair and reinforcement. Among the many polymer options, epoxy resins have become the most promising choice due to their excellent compatibility and coupling effect with cement hydration and their excellent overall performance. In this paper, a novel waterborne epoxy resin-CSA cement composite restoration material was prepared by using a self-synthesized waterborne epoxy resin (WEP). The mechanism by which WEP improves the performance of CSA cementitious restorative material was also elucidated. The results show that by adjusting the amount of WEP, the workability of the repair material can be regulated. WEP significantly improved the interfacial bond strength of the repair material, and the toughness of CSA cement repair material with 10% WEP increased by 32.2% and the tensile ductility increased by 93.8% compared to the control group. The fully cured WEP and CSA cement hydration products form a dense cross-linked network-like structure, which refines the pore structure of the repair material and improves the disadvantages of the highly brittle and low ductility of the repair material.

Investigation on shear mechanical behavior of the interface between sulphoaluminate cement (SAC)-ECC and existing concrete

Sulphoaluminate cement-engineered cementitious composites (SAC-ECC) have the characteristics of fast hardening and early strength. Hence, this can be applied to repair and strengthen building structures. In the present study, the interface shear strength between SAC-ECC and existing concrete was tested. The results revealed that both the interfacial roughness of existing concrete and curing age of SAC-ECC have a significant influence on the interface shear strength between SAC-ECC and existing concrete. All specimens exhibited a tendency for the interface shear strength to increase with the increase in interfacial roughness of existing concrete, and increase in curing age of SAC-ECC. A shear strength prediction model that considered the interfacial roughness of existing concrete and curing age of SAC-ECC was proposed. The accuracy of the proposed model for predicting interface shear strength was verified by comparing it with the experimental results. Under shear loading, the interface bonding force between SAC-ECC and existing concrete consisted mainly of the chemical gluing force and mechanical interlocking force. The van der Waals force was negligible.

Analysis of the treatment of comminuted fractures of tubular bones of the extremities in cats and dogs

Surgical resolution of comminuted fractures of tubular bones is an urgent issue for practicing veterinarians. Comminuted fractures account for 52%, transverse fractures for 8.7%, oblique fractures for 26.1%, and compression fractures for 13.0% of total canine fractures. Thus, comminuted fractures of the tubular bones of the extremities are the most frequent. There are several types of bone fixation in comminuted fractures. Many authors do not recommend using of intramedullary osteosynthesis in the treatment of this type of fracture since it is not possible to connect all bone fractures. The aim of this study was to compare the methods of surgical treatment of comminuted fractures in dogs and cats admitted to the clinics and to choose the most optimal ways of treatment. In total, 4,396 cats and dogs were admitted to the clinic, excluding those admitted for vaccination. The surgical department received 35% of the total number of animals. Patients with bone and joint pathology accounted for 19% of all surgical causes and to 7% of all animals admitted to the clinic. In the group of 9 cats and 9 dogs three main types of fracture were diagnosed: transverse fracture in 6 animals (4 dogs and 2 cats), oblique fracture in 4 animals (3 dogs and 1 cat) and comminuted fracture in 8 animals (2 dogs and 6 cats). The article is illustrated with X-rays images of the clinical cases presented. In order to perform osteosynthesis using a single-plane bilateral external fixator, the authors injected 2-3 Kirchner spokes each into the proximal and distal bone fragments by drilling through the bone while perforating soft tissue on both sides. The ends of the spokes on both sides were bent towards the opposite fragment, parallel to the bone axis, at a distance of 1.0 to 3.0 cm from the skin surface. The ends of the spokes form the rods of a bilateral single-plane fixator. The rod-forming spokes are tightened with wire serrations on 3-4 levels and additionally fixed with fast hardening plastic (turbocast) or bone cement (Palacos, GMW, Osteobond) while controlling the fracture reposition. Combination with wire serclages, sutures, compression screw or intramedullary Kirschner wire osteosynthesis is possible.

Production and Properties of Magnesium Potassium Phosphate Cements Containing Ash and Metallurgical Slag Additives for Radioactive Waste Immobilization

Magnesium potassium phosphate cements (MKPCs) are currently considered as the matrix materials for immobilization of radioactive waste of low and medium activity, as an alternative to Portland cements. At the same time, MKPC compound has the following advantages: fast hardening, high early strength, low shrinkage and high chemical resistance. Magnesium potassium phosphate cement is prepared at room temperature by an acid-base reaction between calcined magnesium oxide (MgO), potassium dihydrogen phosphate (KH2PO4) and water to form magnesium potassium phosphate hexahydrate MgKPO4 ∙ 6H2O known as K-struvite. To obtain MKPC, starting components of high purity and, accordingly, high cost are required. From an industrial point of view, this leads to an excessive price of the final product, and therefore, the use of inexpensive industrial waste as cement fillers is economically cost effective.
 In the present paper, the effect of fly ash and blast-furnace slag additives on the microstructure, compressive strength, and chemical resistance of MKPC samples was studied. The results indicate that particles of both ash and blast-furnace slag are involved in the reaction of MKPC obtaining with the formation of predominantly crystalline K-struvite. According to X-ray diffraction analysis, the content of K-struvite in samples with additives of both fly ash and blast-furnace slag is almost the same and amounts to 58–60 %. With the same addition of filler, samples with the addition of blast-furnace slag have a denser structure, which is formed due to the increased reactivity of blast-furnace slag particles. Moreover, MKPC samples with the addition of blast-furnace slag exhibit higher strength and better chemical resistance to leaching compared to MKPC samples with fly ash additions. The obtained results demonstrate the prospects of using industrial waste additives in the production of MKPC compounds characterized by high mechanical strength and chemical resistance.

Effect of 316L Stainless Steel Fabrication on Oxidation Resistance, Surface Morphology, and Hot Tensile Behavior

Samples based on 316L stainless steel were prepared by conventional manufacturing process (CM) and laser powder bed fusion (L-PBF). Surface morphology changes under air oxidation in the temperature range 600-900 °C were carried out. Tensile tests were carried out in the temperature range of 700-900 °C for strain rates between 0.001 and 0.1 s−1. The materials showed good oxidation resistance up to 700 °C. The CM and L-PBF material had a high mass gain instability and similar microstructures developed under high temperatures were found in both alloys. Increased temperature increases Cr concertation in the L-PBF material up to 40 at.% at 800 °C and a rich Fe based oxide is formed at 900 °C. Slightly thicker oxide scales were formed in the CM than in the L-PBF material.The hot tensile tests reveal that a fast work hardening occurs for all hot tensile tested samples up to a strain of approximately 0.025. Low temperatures and high strain rates within the investigated range promote a second work hardening regime, while a plateau in the flow stress is observed at high temperatures and low strain rates. The highest yield stress and peak stress values are reached at 700 °C. The yield stress is nearly independent of the strain rate at 700 °C. It decreases with a decrease in strain rate for 800 and 900 °C, and it decreases with an increase in temperature. The elongation till fracture varies from 10 to 22%, and it is strongly influenced by defects inherent of the L-PBF process.

Alkali-activated slag mortar molded by non-stirring molding: Compressive strength, hydration properties and microstructures

Alkali-activated slag (AAS) characterized by fast hardening and high early strength has potential application prospects in concrete canvas (CC), where a non-stirring molding method is required to prepare mortar. This paper provides a new method for the preparation of alkali-activated slag mortar (AASM) by non-stirring (sprinkling-molding), where mechanical properties, hydration properties, and microstructures were investigated. The results suggest that the compressive strength of the sprinkling-molding mortar was slightly lower than that of the conventional stirring-molding mortar, and the compressive strength with sodium silicate content of 15 % the slag mass at 28d can reach 44.5 MPa. The hydration products are dominated by amorphous C-A-S-H gels, with small amounts of hydrotalcite. There are differences in degree of hydration and microstructures of each layer in the sprinkling-molding mortar.

Magnesium phosphate cement for powder-based 3D concrete printing: Systematic evaluation and optimization of printability and printing quality

With the advantages of fast hardening, high early strength, excellent bonding strength and room temperature curing, magnesium phosphate cement (MPC) is highly preferable for powder-based 3D concrete printing. In this paper, a systematic approach via comprehending parametric analysis, visualizing techniques (SEM, XRD and X-Ray CT) and mechanical testing is developed to evaluate and optimize printability and printing quality of powder-based 3D MPC printing. The test printing results show that appropriately mapped proportions of ingredients will orient the specific properties towards the target objectives through navigating different combinations of proportions comprehensively. Specifically, 1,2-propylene glycol is able to significantly increase the viscosity of the binder, and Surfynol 465 can substantially reduce the surface tension of the binder. 25 wt% quartz sand can remarkably improve spreadability and surface flatness of the powder bed. In addition, the penetration and diffusion of the binder in the powder bed is effectively controlled by appropriate content of polyvinyl alcohol (PVA) due to the properties of high viscosity and good film-forming, thus remarkably improves printing accuracy. The compactness and hydration degree of the powder-based 3D printed MPC are optimized by 5 wt% PVA (MPC5) with the total porosity reduced by 2.86% compared to that of MPC0 (without PVA). High printing precision of the printed complex geological canyon river model indicates that MPC with appropriate contents of modulators, such as 1,2-propylene glycol and Surfynol 465 for binder and PVA and quartz sand for base powder, is desirable powder-based 3D printable material.

Interfacial bonding properties of styrene-butadiene rubber and ethylene vinyl acetate emulsion-modified OPC–CAC–G repair mortar

Inorganic repair materials such as ordinary Portland cement–calcium aluminate cement–gypsum (OPC–CAC–G), which consist of ordinary Portland cement, aluminate cement, and gypsum, have advantages of fast hardening, high early strengths, and minimal expansion; however, they also have the disadvantages of low bond strengths and weak interface areas, which often lead to repair failure. The interfacial bonding properties of repair materials can be improved by adding highly flexible polymers. In this study, the effects of styrene-butadiene rubber (SBR) and ethylene vinyl acetate (EVA) on the interfacial bonding properties of OPC–CAC–G bonding and the mechanism of the effect of the microstructure are examined using X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy. The results show that and EVA are both effective in improving the interfacial bond strength of OPC-CAC-G repair mortars. SBR is suitable for the modification of repair mortars with an optimum dose of 20%; EVA is suitable for the use as an interface agent on the surface of damaged concrete substrates with an optimum concentration of 40%.

Study on Properties of Slag Base Geopolymer Containing Portland Cement

To explore the application of slag-based polymers, a study was conducted on the physical and mechanical properties of alkali-activated slag-based polymers (AACS) containing silicate cement by partially substituting cement with slag. A comprehensive evaluation of AACS performance was carried out by testing the setting time, compressive/bending strength and shear bond strength, as well as using XRD and SEM microscopic testing methods. The results showed that the AACS material had a fast setting and hardening process. Within a certain range, the compressive strength increased with the increase of cement content and alkali concentration, and the setting time was shortened accordingly. The AACS material had high bending strength and shear bond strength, and even at the 10% cement content level, the bending strength could still be maintained above 8 MPa. According to the SEM experimental results, the micro-morphology of the new and old interface of the AACS material was compact, and the hydration products were fused with the old mortar substrate, exhibiting a good bonding state.