76results about How to "Increased unconfined compressive strength" patented technology

The invention relates to a soil curing agent. The soil curing agent is prepared from the following components in parts by mass: 30 to 100 parts of sulfonated oil, 10 to 40 parts of alkylol amine, 10 to 80 parts of polyol, 0.1 to 0.5 part of polyanionic cellulose and 50 to 100 parts of water. A stabilized soil reagent prepared from the soil curing agent can obtain very good perform indexes including unconfined compression strength, high water stability and the like. Meanwhile, a soil curing agent solution is weakly alkaline so that the soil curing agent is safer to use and the environment protection is facilitated better. The invention further relates to a preparation method of the soil curing agent.

The invention relates to the technical field of building materials and particularly relates to a preparation method of a foundation reinforcement material. The preparation method includes the following steps: mixing and stirring following raw materials, comprising: 30-70% of mineral slag micro powder, 5-20% of steel slag micro powder, 5-20% of fly ash, 5-10% of by-product from desulfuration, 2-20% of cement and 0-4% of an additive; sending the mixture to a finish product storeroom, and packaging the foundation reinforcement material if the material is qualified. In the invention, the foundation reinforcement material is employed as a soil solidifying material. When compared with a sample produced from conventional cement, a sample produced from the foundation reinforcement material is significantly increased in strength and is significantly improved in unconfined compression strength. The foundation reinforcement material is good in anti-permeability, can be used for replacing cement completely and can be used for reinforcing soil body. The raw materials are all selected from solid wastes from steel production, electricity and such industries, so that the foundation reinforcement material is green and environment-friendly. The processing technology is very low in energy consumption, is very less in environment pollution, is low in cost, can effectively reduce foundation treatment cost and is significant in economic benefit.

The invention discloses a saponification slag recycling method and a water-resistant curing agent for recycling, and the method comprises the following steps: mixing saponification slag with fly ash,carrying out waterproof stacking under natural conditions, carrying out air drying to obtain a saponification slag/fly ash mixture, crushing, and sieving; diluting a water-resistant curing agent withwater, spraying the saponification slag/fly ash mixture, adding cement while stirring, uniformly mixing to obtain a mixture, paving, rolling, molding, and carrying out moisturizing maintenance to obtain resource cured saponification slag; the water-resistant curing agent comprises the following components in parts by mass: 50-150 parts of vegetable oil, 1-10 parts of an organic silicon hydrophobicagent, 10-40 parts of a cement retarder and 10-50 parts of a dispersing agent. The saponification slag recycling method is environment-friendly and safe, and solves the problem of secondary environmental pollution risk generated during saponification slag recycling comprehensive utilization.

The invention relates to a water-resistant fatigue-resistant subgrade grouting material. The water-resistant fatigue-resistant subgrade grouting material is prepared from following materials by weight at a water/binder ratio of 0.28 to 3.0 via mixing: 90 to 95% of a binding material, 0.13 to 0.44% of an alkali excitation ingredient, 4.18 to 9.5% of a water-resistant latex, 0.2 to 0.5% of a water reducing agent, 0.01 to 0.02% of a stabilizing ingredient, and 0.03 to 0.05% of a delayed coagulation ingredient. The raw materials are easily available; a preparation method is simple; performance is excellent; the water-resistant fatigue-resistant subgrade grouting material can be applied for strengthening spraying of new subgrade and grouting strengthening of sedimentation subgrade, and possesses excellent effects on areas suffered from long-term rain wash and large rain capacity.

The invention belongs to the technical field of road engineering and discloses a semi-rigid pavement structure and a joint type graded broken stone mixture used in the semi-rigid pavement structure. The semi-rigid pavement structure comprises an asphalt surface layer and a semi-rigid base layer, and is characterized in that a graded broken stone layer is laid between the asphalt surface layer and the semi-rigid base layer, aggregate of the graded broken stone layer is joint type limestone graded broken stones, a binding agent is asphalt, and the used graded broken stone layer is the joint type graded broken stone mixture.

The invention provides a method for preparing solidified soil in use of a soil stabilizer. The method comprises the steps: (1) providing the soil stabilizer and diluting the soil stabilizer with water, thereby obtaining a solution containing the soil stabilizer, wherein the soil stabilizer is Lubang ion soil stabilizer; (2) uniformly mixing soil and the solution containing the soil stabilizer, thereby obtaining a mixed material, wherein the mass ratio of the soil stabilizer and the soil in the solution containing the soil stabilizer is 1: 10000 to 2: 10000 and the soil is red clay in the middle region of Zhejiang province in China; (3) grinding the mixed material, thereby obtaining the solidified soil with compactness of 96-98%.

The invention discloses a geopolymer cementing material for pavement base based on multielement solid waste synergy and a preparation method of the geopolymer cementing material. The geopolymer cementing material is mainly characterized in that fly ash, slag, carbide slag and desulfurized gypsum are used as main materials, the characteristics of various solid wastes are fully played, and the geopolymer cementing material is prepared on the basis of the principle of the geopolymer cementing material by utilizing the synergistic enhancement effect of the solid wastes. Through three main procedures of drying, grinding and secondary uniform mixing, the geopolymer cementing material special for the pavement base is prepared, wherein various performance indexes of the geopolymer cementing material meet the requirements of JT/T 994-2015 Cement for Highway Engineering Pavement Base Stability. Compared with the traditional cement-stabilized pavement base material, the dry shrinkage of the cement-stabilized pavement base material is greatly improved, and the crack hazard of the pavement caused by the dry shrinkage of the base is obviously reduced. Meanwhile, a large number of road building materials can be saved, waste is fully utilized, energy is saved, environmental pollution is reduced, resources are saved, the environment is protected, the road quality is improved, and the green traffic development concept is met.

The invention discloses a supporting process of portal frame type anchor pipe soil nail spraying net and a modified reinforcing cement mortar employed by the same, which can greatly change the compression resistance and the shearing resistance of soft cement soil. In the novel supporting process of the portal frame type anchor pipe soil nail spraying net, a vertical large-diameter anchor pipe soil nail is added on the basis of the existing supporting technique of the conventional soil nail spraying net, a new formula of a 'modified' curing admixture is adopted to perform cement mortar blowing, and when the cross section of a foundation pit has large changes, theoretical and experimental researches are performed on a failure mode and deformation characteristics of the cross section of the foundation pit. Simultaneously, the supporting process is combined with actual projects to prove that the new type foundation pit support form can be adopted to excavate a foundation pit with the depth of 4 to 6 meters in Wenzhou, so not only the technical problem that a conventional soil nail spraying net support cannot be adopted when the excavation depth of the foundation pit in an urban area of Wenzhou is more than 4 meters is solved, but also compared with other available supports, the supporting process is money-saving and time-saving, reduces risks, and has good economic and social benefits.

The invention relates to the field of soft soil foundation hardening, in particular to a soft soil foundation curing agent prepared from industrial waste residues. The advantage that industrial residues are cheap is sufficiently used, and both the problem in treating industrial wastes and the problem in treating soft foundations of sludge soft clay can be solved; in addition, the curing agent provided by the invention is good in early strength, good in application and good in water stability and is capable of remarkably alleviating the problems that sludge soft clay in littoral regions is highin water content and low in shearing resistance.

The invention discloses a soil stabilizer and a preparation method and application thereof and belongs to the technical field of civil engineering materials. The soil stabilizer is prepared from by weight, 1%-3% of sodium chloride, 5%-10% of light-calcined magnesia, 5%-15% of building plaster, 5%-10% of building lime and 70%-80% of granulated blast furnace slag. The solid stabilizer is simple in preparation method, unconfined compressive strength of stabilized soil can be remarkably improved, and water stability of the stabilizer soil can be further improved.

The invention discloses a soil material with high unconfined compressive strength. The soil material comprises composite soil and water. The weight of the water accounts for 8.2%-18.8% of the composite soil. The composite soil comprises, by mass, 1-6% of nanometer aluminum oxide and 94-99% of dry soil. Due to the fact that the dry soil is mixed with a certain mass of nanometer aluminum oxide, the engineering property of the soil is effectively improved, and the unconfined compressive strength of the soil material is effectively improved.

The invention discloses an enhanced ecological foam light soil material and a preparation method thereof, and the enhanced ecological foam light soil material is composed of the following components by the mass percentage: 2%-3.5% of foam, 70%-85% of sludge slurry, 10%-20% of an environment-friendly composite curing agent, 5%-20% of an environment-friendly admixture, and 0.2%-0.6% of an early strength agent. According to the embodiment of the invention, reasonable utilization of sludge resources is realized, the problem of utilization and regeneration of solid waste resources is solved, the environment-friendly light soil is very high in environmental protection property, can be suitable for roadbed filling under different working conditions as filling soil, and has the advantages of low cost and rapidness, simplicity and convenience in construction.

The invention discloses a heavy metal polluted bottom mud curing agent and a curing method thereof, and relates to the technical field of bottom mud treatment. The heavy metal polluted bottom mud curing agent comprises curing powder and a curing liquid which are matched for use, the curing powder is prepared from, by weight, 25 to 35 parts of a heavy metal stabilizer, 1 to 5 parts of water glass,2 to 4 parts of modified chitosan, 1.5 to 2 parts of ammonium persulfate and 1 to 2 parts of polyaluminum chloride, and the curing liquid agent is prepared from, by weight, 10 to 15 parts of polyacrylamide, 5 to 10 parts of sodium polystyrene sulfonate and 0.5 to 1.5 parts of glutaraldehyde. According to the heavy metal polluted bottom mud curing agent and the curing method thereof, the cured bottom mud is slightly neutral, subsequent resource utilization is better facilitated, the stability of heavy metal in the bottom mud is good, the heavy metal in the bottom mud cured product is dissolvedand released again, and the probability of secondary pollution is relatively small.

The invention relates to a curing agent, in particular to a silt compounded curing agent which is prepared from the following components in parts by mass: 20-50 parts of an inorganic material adhesive, 2-5 parts of an activator and 2-10 parts of an organic matter surfactant. The silt compounded curing agent is mainly acted on silt, can replace the traditional construction process of vacuum preloading, rockery skin changing and filling and dynamic compaction and can be used for foundation treatment of expressways, municipal roads, storage yards and various building places.

The invention discloses tabia as well as a preparation method and application thereof. The tabia is prepared from lime, clay, sand, soybean urease, urea, calcium chloride and water. The preparation method of the tabia comprises the following steps: (1) extracting urease from soybeans, and preparing a urease solution; (2) preparing a urea solution and a calcium chloride solution; (3) mixing the lime, the clay and the sand in proportion, and conducting uniform stirring to obtain a mixed material; and (4) adding the urease solution, the urea solution and the calcium chloride solution into the mixed material in proportion, controlling a water content, and conducting curing to obtain the tabia. The tabia can be applied to cultural relic protection, historic building restoration and geotechnical engineering. According to the tabia disclosed by the invention, the permeability and the penetration depth of a to-be-repaired ancient building are improved; and unconfined compressive strength, surface hardness and weather resistance are improved. The preparation method is simple in process step, easy to operate, environment-friendly in raw material and free of pollution. The invention provides wider application scenes for the tabia.

The invention relates to the technical field of soil solidification, in particular to a soft soil solidifying agent, a method for solidifying soft soil and application of the soft soil solidifying agent. The soft soil curing agent provided by the invention comprises cement, aluminosilicate minerals and an alkaline activator, in the soft soil curing agent, silicon-oxygen bonds and aluminum-oxygen bonds of the aluminosilicate minerals are subjected to a fracture-recombination process under the action of the alkaline activator, so that a three-dimensional cross-linked network is generated in cement-cured soft soil, and the curing effect of the cement-cured soft soil is improved. The three-dimensional cross-linked network further improves the solidification effect of the cement on the soft soil, the permeability coefficient of the solidified soft soil is 2.6 * 10 <-8 > cm/s when the solidified soft soil is maintained for 7 days, and the unconfined compressive strength of the solidified soft soil can reach 3.26 Mpa when the solidified soft soil is maintained for 28 days. According to the soft soil curing agent, the method for curing the soft soil and the application of the soft soil curing agent, the technical problems that an existing soft soil curing agent is poor in bead triangle soft soil curing effect and high in cost can be solved.

The invention discloses a composite material for preparing crack-free cement stabilized macadam and a preparation method of the composite material, and belongs to the technical field of road buildingmaterials. The composite material comprises micro-expansion moisture-preserving anti-cracking mineral powder and anti-cracking fibers, and the weight ratio of the micro-expansion moisture-preserving anti-cracking mineral powder to the anti-cracking fibers is 100:(8-20). The preparation method comprises the following steps: 1) adding micro-expansion moisturizing anti-cracking mineral powder into astirrer; 2) adding anti-cracking fibers while stirring; and 3) conducting full stirring, bagging and packaging. Compared with an existing semi-rigid base layer, the invention effectively solves the problem of cracking of a semi-rigid base layer. The preparation method is simple, quality control is convenient, the anti-cracking capacity of the semi-rigid base layer can be effectively improved, cracks are avoided, and therefore the purposes of improving the durability of the semi-rigid base layer and an asphalt pavement and prolonging the service life of the pavement are achieved.

The invention discloses a method for improving unconfined compressive strength of soil by utilizing graphene. The method comprises the following steps: (1) preparing dry soil and water into a soil sample with a set water content; (2) doping the graphene with the mass of 0 to 4 percent of that of the dry soil into the soil sample, and dividing the soil sample into n proportioning groups; (3) preparing m parallel test samples aiming at the modified soil of each group of proportioning by adopting a compacting method; (4) after the test samples are saturated, and immersing for f hours; (5) performing unconfined compressive strength test on the prepared n groups of test samples, and testing the unconfined compressive strength values of the test samples; (6) drawing an unconfined compressive strength relationship curve of graphene content-modified soil samples, and obtaining the doping amount of the graphene when the improvement amplitude of the strength is maximal; (7) drawing stress-straincurves of compressive strength tests of the test samples with different graphene content. Compared with the prior art, the soil is doped with the graphene, so that the structure of the soil body is improved, and the unconfined compressive strength of the soil is improved.

The invention discloses a proportioning method of a super-large-mixing-ratio fly ash cement stable base material and a vibration stirrer. An EDTA titration method is adopted in a traditional method for measuring the cement mixing amount in a cement stabilized base material. The method comprises the following steps: selecting a grading range of a cement stabilized base material, determining the optimal mixing amount of the composite polycarboxylate high-performance admixture, determining the optimal moisture content and the maximum density of the unconfined compressive strength test piece, forming an unconfined compressive strength test piece according to 98% of the maximum dry density on the basis of the optimal moisture content and the corresponding maximum dry density obtained in the step 3, performing an unconfined compressive strength test, and detecting the actual water content and the mixing amount of cement and fly ash of the cement stabilized base material, wherein the cement stabilized base material is newly mixed with the optimal water content and the maximum dry density. The method is used for proportioning and stirring the super-large-mixing-amount fly ash cement stablebase material.

The invention provides a shallow soft-base soil curing technology and system. The shallow soft-base soil curing technology can be used to conduct curing treatment on shallow soft-base soil, such as shallow soft-base sludge and shallow soft-base silt. According to the shallow soft-base soil curing process, in the curing construction process, the position of the shallow soft-base soil is not required to be moved, only a soft-base soil curing agent is required to be added into the shallow soft-base soil located in the original position, and stirring and mixing are conducted on the shallow soft-base soil located in the original position and the soft-base soil curing agent, so that the curing construction procedure is greatly simplified, the construction efficiency is improved, and the construction cost is reduced. The invention further provides a sludge curing agent and a silt curing agent. By using the provided sludge curing agent and the silt curing agent to conduct curing treatment on the shallow soft-base sludge and the shallow soft-base silt, the good curing effect can be obtained, and formed cured soil has high unconfined compressive strength and further has a gas isolation effect, so that no odor gas is emitted, and environmental safety is ensured accordingly.

The The invention relates to the technical field of subgrade engineering, and particularly discloses a sandy silt subgrade filling construction method and application thereof. According to the sandy silt subgrade filling construction method, sandy silt doped with a curing agent serves as a subgrade, the CBR strength of the subgrade can greatly meet the construction requirement after the subgrade is fully compacted under the optimal water content, and theunconfined compressive strength is effectively improved. Meanwhile, the curing agent can generate more gel substances, so that soil sample particles are more compact, the strength and the stability of a cured soil body are greatly improved, the volume shrinkage in the freezing and thawing process is effectively reduced, the phenomena of local pulverization and peeling and corner falling of the soil sample are improved, and then the freezing and thawing cycle resistance can be effectively improved; and the problem that an existing sandy silt subgrade filling construction method cannot effectively improve the freeze-thaw cycle resistance of a sandy silt subgrade is solved, and wide market prospects are achieved.

The invention relates to the technical field of road building materials, in particular to modified ardealite stabilized macadam and a preparation method and application thereof. The modified ardealite is adopted as a hydraulic material and fully filled among aggregates, all the components are bonded, the early strength of a gravel layer is enhanced, meanwhile, the red mud is matched to regulate and control the micro-expansion effect formed in the hydration process, the resistance of the gravel layer to early shrinkage cracking is improved, chemical fibers are added, the toughness of the chemical fibers is utilized, expansion stress is limited, the anti-fatigue performance of a road base is improved, and cracking caused by excessive expansion in the later strength development process of the gravel layer is avoided. The modified ardealite stabilized macadam provided by the invention can effectively solve the problem of shrinkage cracking of the current road base material, and the service life of the road base is prolonged.