29 results about "Pozzolanic reaction" patented technology

The invention discloses marine concrete resistant to chlorine salt erosion and a preparation method thereof, and belongs to the technical field of building materials. The marine concrete is prepared from the following components in parts by mass: 280 to 350 parts of cementing material, 1100 to 1200 parts of aggregate, 150 to 180 parts of mixing water and 2.5 to 4.0 parts of high-efficiency water reducing agent, and the cementing material is prepared from 210 to 270 parts of ordinary Portland cement, 50 to 70 parts of superfine slag powder and 10 to 20 parts of modifier on the basis of the cementing material; on the basis of the modifier, the modifier is prepared from 30 to 45 parts of hexacalcium aluminoferrite, 25 to 35 parts of metaettringite, 20 to 35 parts of tobermorite, 3 to 6 parts of nano attapulgite and 2 to 4 parts of a nano composite material. The components can accelerate the early hydration of cement and the volcanic ash reaction process in the concrete hardening process, so that the concrete can form a compact microstructure in the curing period and cooperate with the curing effect of a hydration product on chloride ions, thereby remarkably improving the chloride ion penetration resistance of the concrete, prolonging the service life of the structure and improving the concrete quality. The method is suitable for port engineering, maritime work structures and buildings in salinized soil areas.

The invention relates to the technical field of reinforced concrete, in particular to a preparation technology of a reinforced concrete telegraph pole, the performance of the concrete telegraph pole is improved through a multi-scale fiber synergistic toughening method, when the telegraph pole bears a bending load, steel fibers firstly play a role to restrain large cracks, and when micro cracks appear, the steel fibers play a role to restrain the large cracks. The denser composite fiber network bears stress to realize multi-stage crack resistance, which is combined with the high early strength characteristic of the sulphoaluminate cement, so that the telegraph pole has excellent impact resistance and fatigue resistance while obtaining extremely high early strength; the surface of the aggregate modified by the silicon dioxide aerogel is covered with a high-activity and high-specific-surface-area nano silicon dioxide layer, and in an alkali-rich and calcium-rich environment provided by sulfo-aluminate water cement hydration, the nano silicon dioxide and a cement hydration product are subjected to a violent pozzolanic reaction, so that the surface of the aggregate is modified by the sulfo-aluminate water cement; therefore, the compressive strength and the flexural tensile strength of the concrete are remarkably improved.

A method of preparing an enhanced reactivity pozzolan may include: contacting a starting pozzolan with a catalyst material to form a mixture of the starting pozzolan and the catalyst material; reacting the mixture of starting pozzolan and catalyst material during an induction period to form reaction products; and recovering the enhanced reactivity pozzolan.

A method of preparing an acid modified pozzolan may include: contacting a starting pozzolan with an acid to form a mixture of the starting pozzolan and the acid; reacting the mixture of starting pozzolan and the acid during an induction period to form reaction products; and recovering the acid modified pozzolan.

The invention belongs to the technical field of concrete, and provides ecological concrete and a preparation method thereof, the ecological concrete comprises 25-35 parts of steel slag, 10-20 parts of slag powder, 5-10 parts of desulfurized gypsum, 30-35 parts of recycled aggregate, 5-8 parts of charcoal, 1-2 parts of fiber, 1-1.5 parts of a water reducing agent, 0.5-1 part of an air entraining agent, 1-2 parts of an antifreezing agent, and 15-20 parts of water. The steel slag serving as an early strength and alkaline component of the concrete not only provides strength, but also can release calcium hydroxide in the hydration process due to the calcium oxide active component contained in the steel slag, so that an alkaline environment is provided for the system; the superfine slag powder is rich in active silicon dioxide, aluminum oxide and other components and can be subjected to a pozzolanic reaction with calcium hydroxide in an alkaline environment, so that the later strength of the ecological concrete is remarkably enhanced, and the defect that the later strength of the steel slag is slowly increased is overcome; according to the invention, volcanic ash reaction is taken as a core mechanism, and the strength and durability are improved by recycling wastes.

The invention discloses a performance improvement mechanism and a preparation method of a modified Aga soil material, a silane coupling agent and hydraulic lime are added into traditional Aga soil (Aga soil, water, elm bark juice and clear oil), and the modified Aga soil material is formed by combining a Tibetan ramming process. The modification principle is as follows: a silane coupling agent is dissolved in water to form a silanol solution, the silanol solution permeates into Aga soil along with ramming after being sprayed, and the hydraulic lime and the Aga soil are subjected to a pozzolanic reaction to generate a gelling product mainly comprising hydrated calcium silicate, so that the bonding and overall mechanical properties among particles of the Aga soil are improved; silanol and hydroxyl groups on the surface of the gelling product are subjected to dehydration condensation to form siloxane covalent bonds and enhance the structural stability; then, the silanol molecules are subjected to cross-linking polymerization, an organosilane polymer hydrophobic membrane is formed on the surfaces of the Aga soil and the gelling product, moisture is effectively blocked, and the water resistance and the impermeability of the Aga soil material are improved. The preparation method disclosed by the invention is simple, convenient, green and environment-friendly, can obviously improve the mechanical and durability of Aga soil, and has a good engineering application prospect.

The invention discloses a modified material for earthen archaeological site disease repair and a repair effect evaluation method thereof, and relates to the technical field of earthen archaeological site repair, the modified material comprises a silicon-calcium-based modified material based on metakaolin (A), calcium hydroxide (C) and silica fume (S) and an optimal ratio thereof, a comprehensive engineering performance test proves the feasibility of the silicon-calcium-based modified material in earthen ruins disease repair, the optimal ratio of A to C to S of the finally obtained ACS modified soil is 1: 2: 4, the added ACS modified material can generate a remarkable pozzolanic reaction with the ruins soil, and the denudation resistance and long-term durability of the original ruins soil are improved.

The invention discloses a soft soil curing material with synergistic effect of waste concrete recycled micro powder and lime and a preparation method of the soft soil curing material, and belongs to the technical field of soft soil curing. The soft soil curing agent provided by the invention comprises calcium hydroxide and waste concrete recycled micro powder in a mass ratio of 3: 7, wherein the particle size of the waste concrete recycled micro powder is less than 0.16 mm. According to the invention, unhydrated cement particles and active SiO2, Al2O3 and other components contained in the waste concrete recycled micro powder are utilized, and a pozzolanic reaction is carried out under the alkaline excitation action of calcium hydroxide, so that a hydrate (such as C-S-H gel) with gelling property is generated in the solidified soft soil. Gelling substances generated in the curing process of the calcium hydroxide and the waste concrete recycled micro powder can effectively bond soil particles in the soft soil to fill pores and consume free water in the soft soil at the same time, so that the mechanical property of the cured soil is greatly improved.

The invention belongs to the technical field of shield under-pressure bin opening, and particularly provides a composite clay mixed solution and application thereof, and the composite clay mixed solution is prepared from bentonite slurry, methyl cellulose and slaked lime; the bentonite slurry is obtained by mixing a bentonite solution and a sodium silicate solution, and the bentonite solution is obtained by mixing water and sodium bentonite. According to the composite clay mixed solution provided by the invention, methyl cellulose and slaked lime are introduced to synergistically enhance a system; specifically, methyl cellulose (MC) is used as a non-ionic thickening agent, and methoxyl (-OCH3) on a molecular chain of the methyl cellulose (MC) improves the consistency of a system through hydrogen-bond interaction. MC with the viscosity of 4000 mPa.s is selected in an experiment, and the addition amount of the MC is 0.3%-0.5% of the mass of the bentonite; the slaked lime and SiO2 in the bentonite are subjected to a pozzolanic reaction, and the shear strength of the system can be increased to 2.8 kPa within 6 h through the reaction.

The invention discloses a cement-loaded multi-scale silicon source composite anti-seepage grouting material and a preparation method thereof, and belongs to the field of geotechnical engineering anti-seepage grouting materials. The grouting material is prepared from ordinary Portland cement, micron-scale rice hull ash, nano-scale nano silicon dioxide and sodium bentonite. The rice hull ash reacts with the volcanic ash through physical filling to optimize micron-sized pores; nano-scale pores are filled with nano-silicon dioxide, cement hydration is accelerated, and the nano-silicon dioxide and the nano-silicon dioxide synergistically optimize the pore structure and promote densification of C-S-H gel. The sodium bentonite can retain water, thicken and improve the stability of the slurry. The cross-scale synergistic effect of the multi-scale silicon sources constructs a multi-level compact filling structure from nanometer to micrometer and a multi-level hydration reaction enhancing system in the grouting material, the compactness and anti-seepage performance of the material are remarkably improved, and the grouting material is suitable for engineering fields such as water conservancy dams, tunnels, deep mines, landfills and the like with extremely high anti-seepage performance requirements.

The invention discloses a method for electric heating curing of a steel fiber-containing ultra-high performance concrete test piece, and relates to ultra-high performance concrete.The method comprises the steps that an electrode is installed in the steel fiber-containing ultra-high performance concrete test piece, and the electrifying voltage is set according to the age of the steel fiber-containing ultra-high performance concrete test piece; and electrifying an electrode mounted on the steel fiber-containing ultra-high performance concrete test piece with alternating current according to the electrifying voltage until a set target time period is reached. Alternating current is applied to the test piece within 1-24 hours after pouring, and the internal temperature of the test piece is raised to the target temperature and maintained by electrifying for 3 hours, so that cement hydration and silica fume pozzolanic reaction are efficiently promoted, rapid densification of a microstructure is realized, and early strength development is remarkably accelerated; the core problems of power-on lag, high polarization risk, process parameter stiffness, dependence on factory precuring and the like of the existing method are solved.

The application discloses a cement-based anticorrosion and antifreezing material and a preparation method thereof, and belongs to the technical field of building materials. The cement-based anticorrosion and antifreezing material comprises the following components in parts by weight: 250-350 parts of cement, 80-150 parts of modified fly ash, 50-100 parts of mineral powder, 20-40 parts of silica fume, 10-25 parts of glue powder, 3-8 parts of water reducing agent, 10-30 parts of acrylic emulsion, 1-3 parts of hydroxypropyl methyl cellulose ether, 2-5 parts of fumed silica and 400-500 parts of fine aggregate. The modified fly ash is used in combination with various auxiliary cementitious materials such as the mineral powder and the silica fume, thereby forming an efficient pozzolanic reaction system. Meanwhile, polymers such as the acrylic emulsion and the glue powder are introduced, a flexible network is constructed in the inorganic hard skeleton, rigidity and flexibility are achieved in combination, and auxiliary agents such as the efficient water reducing agent and the cellulose ether are used, so that the material not only has good anticorrosion and antifreezing performance after hardening, but also has excellent workability, water retention and adhesion in the construction process, and is suitable for various construction process requirements, and has good engineering application value.

The present application relates to the technical field of building materials, and particularly relates to an organic-inorganic composite ternary microsphere capable of realizing self-riveting in a cement matrix, and a preparation and application thereof, the microsphere comprising: a microcapsule body with a repairing agent as a core and a semi-interpenetrating network hydrogel material as a shell; the shell surface is inlaid with a pozzolanic material, and the pozzolanic material is used for pozzolanic reaction with the cement matrix to realize riveting of the two. The preparation method comprises the following steps: pre-mixing the pozzolanic material and water to obtain a suspension; adding semi-interpenetrating network hydrogel prepolymers into the suspension to obtain a first mixture; mixing the first mixture, the repairing agent and an emulsifier to obtain a second mixture; and crosslinking and solidifying the second mixture by using a sharp hole-coagulation bath method to form the microsphere. The microsphere of the present application can successfully construct a self-riveting structure with the cement matrix, and solves the problems of poor interface bonding and low self-repairing efficiency caused by the water-absorbing microcapsule as the shell of the hydrogel.

A method of preparing an enhanced reactivity pozzolan may include: contacting a starting pozzolan with a catalyst material to form a mixture of the starting pozzolan and the catalyst material; reacting the mixture of starting pozzolan and catalyst material during an induction period to form reaction products; and recovering the enhanced reactivity pozzolan.

A carbon-sequestering concrete composition and method of production are disclosed. The composition comprises geopolymer binder components, aggregates, and alginate beads formed from brown algae powder through ionic gelation. The alginate beads significantly increase CO2 absorption surface area compared to algae powder, creating a matrix across the concrete surface that enhances long-term sequestration and improves durability. The beads interact synergistically with other concrete components, including geopolymers, fly ash, and ground granulated blast furnace slag, to enhance pozzolanic reactions and create additional sites for carbon dioxide capture. The alginate beads also facilitate the dissolution of minerals like olivine, further enhancing carbon capture. The composition demonstrates superior carbon sequestration capabilities, enabling sustained CO2 absorption throughout its service life. The method includes forming alginate beads, incorporating them into the concrete mixture, and allowing for initial hardening and drying processes that promote carbon dioxide absorption directly from the air.

The invention discloses application of silica fume in a ceramic tile adhesive. The mixing amount of the silica fume is 5-10% of the total mass of a cementing material. Through filling and pozzolanic reaction, the ceramic tile glue and the interface on the back surface of the ceramic tile are firmly combined, and hollowing and falling are effectively avoided. The tile adhesive has extremely low water absorption and excellent anti-permeability, and the dense structure blocks the permeation of water, so that the tile adhesive has excellent waterproof and anti-permeability performances. The method is crucial to wet areas such as toilets and swimming pools, and can also effectively resist freeze-thaw damage. Excellent durability and chemical stability are achieved, reduction of the Ca (OH) content means that corrosion by media such as acid and salt is not prone to occurring, the carbonization resistance is higher, and the service life is longer. Shrinkage is reduced, cracking resistance is achieved, the denser structure and reduced free water can reduce drying shrinkage, and the cracking risk is reduced.

The application provides a basalt powder and a basalt fiber reinforced anti-cracking mortar and a preparation method thereof, and belongs to the technical field of cement, concrete and other building materials. The application comprises components of Portland cement, basalt powder, graded sand, basalt fiber, latex powder, cellulose ether and water reducing agent. The application optimizes the compactness of the matrix by filling and reacting with the basalt powder and the pozzolanic ash, and forms a three-dimensional reinforcing network with strong interfacial bonding by using the basalt fiber which is subjected to surface etching and silane coupling treatment. The two components synergistically improve the crack resistance and toughness of the mortar, and the mortar shows a high ductility failure mode with multiple crackings. Meanwhile, the tensile strength, the bending strength and the compressive strength of the mortar are comprehensively enhanced, and the fracture energy is significantly improved. In addition, the high-density matrix and the corrosion-resistant fiber together endow the mortar with excellent impermeability, freeze-thaw resistance and corrosion resistance, and greatly prolong the service life.

The embodiment of the invention provides a lightweight aggregate with a multi-layer core-shell structure and a preparation method thereof, the lightweight aggregate with the multi-layer core-shell structure comprises: an inner core, the preparation raw materials of the inner core comprise water-storage lightweight particles and a functional ion solution; the inner shell covers the inner core, and the preparation raw materials of the inner shell comprise cement, a volcanic ash material, solid waste, lime, a water reducing agent and water; the inner shell is coated with the outer shell, and preparation raw materials of the outer shell comprise cement, a volcanic ash material, a water reducing agent, nanofibers and water. According to the lightweight aggregate with the multi-layer core-shell structure and the preparation method of the lightweight aggregate, through internal curing of the inner core, pozzolanic reaction in the inner shell and the toughening effect of the nanofibers in the outer shell, the mechanical property of the lightweight aggregate with the multi-layer core-shell structure is improved, and the filling and bridging effects of the nanofibers are fully exerted; the mechanical property of an interface transition area is improved, and the lightweight aggregate with the multi-layer core-shell structure, which is low in density, high in strength and high in elastic modulus, is obtained.

The invention discloses a green low-carbon flow-state solidified soil material as well as a preparation method and application thereof. The fluid-state solidified soil material comprises a gelling component, an alkali-activated component and a biopolymer component, wherein the gelling component is a mixture of mineral powder and fly ash; the alkali excitation component is sodium hydroxide; the biopolymer is xanthan gum. Active ingredients of the gelling component are subjected to pozzolanic reaction under the action of alkali excitation to generate hydrated calcium silicate gel and aluminosilicate gel. Hydroxyl groups and carboxyl groups on molecular chains of xanthan gum and water molecules form hydrogen bonds, a three-dimensional gel network is formed, pores between soil particles and the cementing material are filled, and the mechanical property of the material is improved. In addition, the excellent water holding performance of the xanthan gum effectively improves the dry-wet cycle resistance of the material. The flow-state solidified soil material based on the biopolymer compounded calcium-based curing agent has good construction workability, mechanical property, water holding capacity and dry-wet cycle resistance, and is suitable for application scenes such as vertical barrier barrier building, underground pipeline backfilling and foundation pit fat groove backfilling.

The invention provides a synergistically cured ardealite-based cementing material and a preparation method thereof, and preparation raw materials of the synergistically cured ardealite-based cementing material comprise a cementing material dry material; the dry cementing material comprises the following components in percentage by mass: 10%-40% of nano lime, 15%-40% of calcined clay, 10%-40% of cement and 5%-40% of phosphogypsum; the nano lime is prepared by grinding a calcium-based carbonate material, calcining for 2-10 minutes at the temperature of 800-1000 DEG C and quenching. According to the invention, a good alkaline environment and initial driving force are provided for the pozzolanic reaction of calcined clay and the hydration reaction of cement through the rapid reaction characteristic of the nano lime with high-surface-activity nano calcium oxide, and more gelatinization products are generated; the nano lime, the calcined clay and the cement form an organic whole which promotes each other and has a synergistic effect, so that the removal rate of free harmful substances in the phosphogypsum is greatly increased.

The invention belongs to the technical field of geotechnical materials and foundation treatment, and particularly discloses a loess composite modifier and a preparation method thereof, and the loess composite modifier comprises 48-50% of loess, 20-22% of fly ash, 28-32% of desulfurized gypsum and nano montmorillonite accounting for 0.8-1.2% of the total mass of the loess, the fly ash and the desulfurized gypsum. According to the invention, a low-carbon, economic and sustainable composite modifier with multi-scale synergistic interaction capability is constructed, the micro pore structure and water absorption path of the loess can be improved by utilizing the nano montmorillonite, and the calcium-sulfur activation effect of the desulfurized gypsum can be exerted to promote the pozzolanic reaction of the fly ash; and the three components synergistically construct a denser and more stable cementation network structure, so that the method has important theoretical significance and engineering application value for improving the strength, water stability and long-term durability of the loess in a complex environment.

The invention discloses a repairing material for hydrogen storage reservoir injection and production well leakage and a preparation method thereof, and belongs to the technical field of repairing materials for hydrogen storage reservoir injection and production wells, through molecular structure design, fluorine-containing long chains and chemical anchoring groups are introduced into a graphene oxide aerogel skeleton, a double-defense system of'hydrophobic barrier-interface anchoring 'is constructed, and the hydrogen storage reservoir injection and production well leakage repairing material can be used for repairing hydrogen storage reservoir injection and production well leakage. The low surface energy characteristic of fluorine-containing groups is utilized to construct a gas slippage boundary on the micropore wall surface, and the oriented layered structure of aerogel is matched to prolong a gas diffusion path, so that hydrogen permeation is greatly blocked from the physical level; by means of the in-situ pozzolanic reaction of the anchoring component and the shaft old cement hydration product, high-strength C-S-H gel is generated on a repairing interface, chemical bonding and mechanical interlocking of the material and the crack wall face are achieved, the defects that a traditional material is prone to stripping and poor in high-pressure washing resistance are overcome, and the repairing effect is good. And a repairing material with low cost and high reliability is provided for long-acting sealing of the shaft of the hydrogen storage warehouse.

This patent application discloses a red mud solidifying agent and its preparation method. The red mud solidifying agent is prepared from the following raw materials: metakaolin, accounting for 18-22% of the total mass of the solidifying agent; the remaining mass of the solidifying agent after removing the metakaolin, by mass percentage, consists of 5-20 parts fly ash, 1-20 parts slag, and 1-15 parts sodium silicate as an alkaline activator. The red mud solidifying agent synergistically solidifies red mud through multiple processes such as geopolymerization, "volcanic ash reaction," and filling-dispersion reaction. The active silica, alumina, and alkali ions abundant in red mud directly participate in the reaction, forming dense, uniform, and high-strength solidified red mud. Using the red mud solidifying agent to solidify red mud can reduce the consumption of building materials such as cement and lime during highway construction, thereby reducing costs and environmental pollution. In addition, it can promote the resource utilization of red mud and the comprehensive utilization of industrial wastes such as fly ash and slag, possessing both economic and environmental value.

Method of producing a pozzolanic material in a cement manufacturing plant, comprising: - providing a silico-aluminous mineral material susceptible of pozzolanic reactivity upon calcination, - introducing the silico-aluminous mineral material into the rotary kiln via the kiln feed installation without having been thermally treated in the combustion chamber and calcining the silico-aluminous mineral material in the rotary kiln at a temperature of 400-900°C, preferably 600-900°C, in order to obtain said pozzolanic material, combusting a non-fossil, alternative fuel by means of the main burner for providing thermal energy to the calcination process, - guiding the combustion gas from the kiln inlet chamber into the combustion chamber and combusting a fuel in the combustion chamber, thereby raising the temperature of the combustion gas to an elevated temperature of above 850°C and keeping the combustion gas at said elevated temperature for at least 2 seconds.

The invention discloses a staged soil wall solidification post-grouting method, which comprises the following steps of: injecting slurry which takes quick-setting sulphoaluminate cement as a basis and is doped with a controllable foaming agent and reserved active components for the first time, and quickly constructing a porous active framework which has early strength and communicated pores behind a segment, so that supporting force is immediately provided to stabilize a stratum; then, in an accurate time window, the superfine muck is injected for the second time, various high-activity mineral admixtures are compounded, and slurry with ultrahigh fluidity is obtained by means of a high-efficiency water reducing agent, so that the slurry fully permeates into pores of the primary framework under low pressure; a chemical active interface formed by active silicon and calcium sources reserved in primary grouting and high-activity components (such as superfine slag powder and nano metakaolin) carried in secondary grouting are subjected to deep pozzolanic reaction and secondary hydration at the interface, a compact hydration product is generated, physical filling and chemical bonding change are achieved at the same time, and the high-performance grouting material is prepared. And a whole with a firm interface and an integrated structure is formed.

The invention relates to a modified lepidolite slag roadbed filler and a preparation method thereof, and belongs to the technical field of roadbed engineering. The modified lepidolite slag roadbed filler comprises the following components in parts by weight: 74-80 parts of lepidolite slag, 0.8-1.2 parts of potassium ferrate powder, 1.5-2 parts of lime, 1.2-1.8 parts of a composite modified adsorption material, 1.5-3 parts of blast furnace slag powder and 14-18 parts of water. According to the modification principle, the utilization requirement of harmless engineering is met by utilizing the complementary chemical characteristic of materials such as the lepidolite slag and the inorganic modifier, so that the lepidolite slag is used for roadbed filling engineering, and the preparation process can effectively solve the problems that heat is rapidly released due to the lime hydration reaction and the volcanic ash reaction, the temperature is sharply increased and the construction cost is reduced. Therefore, the condition that the curing effect of the lepidolite slag roadbed filler is reduced is avoided. Through a unique material formula and a preparation process, the lepidolite slag is converted into a green and harmless roadbed material with stable pavement performance, and the roadbed material is used for road engineering construction.

The invention discloses a high-performance ceramic tile adhesive composition and a preparation method thereof, and relates to the technical field of adhesives, the high-performance ceramic tile adhesive composition comprises the following components: 35-48% of a cementing material; 42%-56% of aggregate; 3.5%-7.5% of polymer rubber powder; 0.04%-0.16% of a water retention thickening agent; wherein the gelling material comprises temperature response type micro-coated gelling particles; the composition further comprises a reinforcing fiber, the surface of which is modified by a temperature-sensitive polymer, and a zwitterionic polymer having a temperature-sensitive segment. According to the invention, through the design of temperature-responsive micro-coated gel particles, cement is used as an inner core, a composite layer of a temperature-sensitive polymer and silica fume is used as a coating layer, a cooperative triggering mechanism of cement hydration and silica fume reaction is constructed, and the pozzolanic reaction of silica fume is directly triggered in an early stage; the problem that silica fume cannot participate in early-stage structure construction due to reaction lag is avoided; in the later stage, the silica fume fully reacts in the coating layer to generate hydrated calcium silicate gel, and pores left by cement hydration can be accurately filled with the hydrated calcium silicate gel.

The invention discloses a method and equipment for preparing a high-activity desulfurizing agent. Calcium hydroxide and a siliceous material are adopted and subjected to a pozzolanic reaction to form a calcium silicate hydrate desulfurizer, fly ash is used for preparing the desulfurizer, and the cost in conventional preparation is greatly reduced; the preparation process is simple, the material is in contact with water in a flying dust state, the reaction is more sufficient, and the water consumption is greatly reduced; the high pressure in the reaction process enables the product to be expanded through rapid pressure relief when the reaction is completed, the specific surface area is larger, the product is basically dry, and the prepared desulfurizer has good desulfurization activity.

A stabilization or electro-cementation method of calcareous sand is provided. Calcareous sand, SiO2 nanoparticles, AI2O3 powder and NaCl solution are first mixed. The mixture is treated by passing a DC current through the mixture in which the applied voltage is sufficient as a decomposition voltage of the mixture to cause electrolysis so that pozzolanic reactions can take place within the mixture. Pozzolanic reactions continue to take place beyond the electrokinetic (EK) treatment time. In one embodiment, the post EK treatment time required to achieve hardening caused by pozzolanic reactions can last for at least 60 days. Once the treatment is considered satisfactory, the treated mixture can be tested or loaded. The compressive and shear strengths of the treated sand are significantly improved. The nature of the treated soil is changed from a granular material into a rock. The method has a low carbon footprint compared to other stabilization methods.