14 results about "Hydraulic lime" patented technology

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 application provides an adsorption-induced transmission type hydraulic lime suspension and a preparation method thereof, and belongs to the technical field of building materials. The application uses the knowledge of suspension particle dynamics, selects spherical micro-nano pozzolanic materials as the hydraulic component to promote the kinetic stability of the hydraulic lime suspension and the permeability of the hydraulic lime suspension in the earthen site. However, the specific surface area of the regular spherical particles is relatively small, the adsorption in the earthen site is small, and the regular spherical particles are prone to return migration to the surface of the earthen site to form whitening as the solvent evaporates. The application uses the alkali activation and hydrothermal synthesis method to load the silicon / aluminum gel and zeolite with super-large specific surface area on the surface of the pozzolanic material, plays an adsorption-induced transmission role, realizes the deep penetration of the hydraulic lime suspension in the earthen site, and avoids the return migration phenomenon.

The application discloses a kind of for sandstone class stone historical relic body protection bonding material and protection method, it is related to sandstone class relic protection technical field, its technical key points are: including binder and grouting material, by mass ratio, binder is composed of the following components: 12-18% ultrafine portland cement, 0.5-1% sodium silicate, 8-12% water, 70-76% hydraulic lime;Grouting material is composed of the following components: 97-98% epoxy resin, 2-3% metakaolin.The application improves the compressive strength, tensile strength and shear strength of sandstone historical relics by using bonding material for historical relic restoration, and further improves the weathering resistance and corrosion resistance of sandstone historical relics, which is of great significance for the protection and improvement of the safety performance of historical relics.

This invention discloses a microcapsule-modified self-healing mortar, its preparation method, and its application, belonging to the technical field of stone cultural relic protection and restoration materials. The microcapsule-modified self-healing mortar, by mass percentage, comprises the following dry materials: 50%-70% hydraulic lime, 12%-24% nano-kaolin, 15%-25% quartz sand, 0.05%-0.2% additives, and 0.25%-2% microcapsule powder; wherein the core material of the microcapsules in the microcapsule powder is tung oil, and the wall material is barium alginate. The microcapsule-modified self-healing mortar possesses high weather resistance, excellent compatibility, and long-term durable self-healing function. By introducing tung oil-barium alginate microcapsules, the microcapsule-modified self-healing mortar synergizes with traditional restoration mortar raw materials, enabling the mortar material to trigger active repair components in the early stages of deterioration, achieving self-healing and self-repair effects.

The application provides a preparation method of natural hydraulic lime, which comprises the following steps: calcining natural hydraulic lime raw material to obtain a calcined product; and mixing the calcined product with digestion water containing a digestion regulator to perform a digestion reaction, so as to obtain natural hydraulic lime, wherein the digestion regulator is selected from hydrochlorides of alkali metals, sulfates of alkali metals and hydrofluorides of alkali metals. The method is simple in process and convenient to operate, and the natural hydraulic lime obtained by using the method has high carbonation activity.

The present invention relates to a novel ecological hydraulic binder composition for plant aggregate materials, such as hemp concrete. The composition of the invention incorporates a very high content of natural hydraulic lime while ensuring optimal mechanical properties. The invention proposes in particular to optimize the mechanical performance by using a mixture of calcium sulfate and calcium aluminate cement. The setting and hardening time of the materials is also significantly reduced, which makes it possible to accelerate the production of plant aggregate materials.

The invention belongs to the technical field of building materials and stone cultural relic protection, and discloses a composite material for repairing stone cultural relics in a cold environment and a preparation method thereof.The preparation method includes the steps that S1, natural hydraulic lime, metakaolin and deionized water are weighed according to the proportion and stirred to be uniform, and slurry a is obtained; s2, a modified material is added into the slurry a and stirred uniformly, slurry b is obtained, and the modified material is any one or more of carbon nanotubes, nano-silica and glutinous rice slurry; s3, the slurry b is subjected to injection molding, demolding is conducted after room-temperature curing, then the slurry b is placed in an environment with the fixed temperature and humidity to be cured, and the hydraulic lime-based composite material is obtained. The hydraulic lime-based composite material provided by the invention has low shrinkage, relatively high early strength and excellent freeze-thaw resistance, and is suitable for repairing and reinforcing stone cultural relics in a cold environment.

This invention provides a fluorinated polyether-modified nano-silica sol and a composite silicate inorganic coating for hydraulic lime-based walls, and their preparation method, belonging to the technical field of inorganic silicate coatings. The preparation method of the fluorinated polyether-modified nano-silica sol includes: condensing a polyether modifier with nano-silica sol in the presence of ammonia; the polyether modifier is a fluorinated polyether silane modifier or a polyether alcohol modifier. This invention also provides a fluorinated polyether-modified nano-silica sol composite silicate inorganic coating, comprising a S1 component and an S2 component in a mass ratio of 1:0.2~1.0, wherein the S1 component comprises an inorganic silicate solution, the fluorinated polyether-modified nano-silica sol, a polymer emulsion, a defoamer, a dispersant, a stabilizer, and water; the S2 component comprises dolomite powder, calcined kaolin, titanium dioxide, and a dispersant. The coating of this invention can improve the fluidity and leveling properties of the coating, making the construction process smoother and the coating quality higher.

The application provides a stone cultural relic crack grouting method based on a high-pH-resistant microbial mineralization process. The method comprises small-scale crack and large-scale crack grouting repair; the small-scale crack is treated by grouting with a microbial slurry, and the microbial slurry is prepared from urea, a high-pH-resistant microbial liquid and hydraulic lime; the large-scale crack is sealed and protected by hot melt adhesive and paper adhesive tape before grouting, grouted by microbial mortar prepared from stone powder, hydraulic lime, urea and the high-pH-resistant microbial liquid, and subjected to surface shaping treatment after the grouting and curing are completed; and the high-pH-resistant microbial liquid is obtained by domesticating non-toxic and harmless microorganisms. The application provides a technology and method suitable for cracks of stone cultural relics of multiple scales, can improve the early strength of the hydraulic lime, has the advantages of good salt resistance, green environmental protection, simple operation, low cost, wide application range and the like.

The invention belongs to the technical field of resource utilization of inorganic non-metallic materials and solid wastes, and discloses natural hydraulic lime based on construction wastes and a preparation method of the natural hydraulic lime. The natural hydraulic lime comprises the following raw materials in percentage by mass: 5-35% of waste concrete powder, 60-90% of carbide slag powder and 1-5% of red mud powder. According to the present invention, three bulk solid wastes are adopted as main raw materials, such that the effects of waste treatment with waste and synergistic utilization are achieved, the prepared product is the high value-added natural hydraulic lime, and can replace the traditional NHL, and the ratio of the three waste residues is accurately adjusted so as to stably produce the series products with different strength grades of NHL2, NHL3.5 and NHL5 so as to meet different market requirements.

The invention provides a preparation method of high-performance natural polymer modified mortar based on a wood orange extract additive, and belongs to the technical field of modified mortar. The preparation method of the high-performance natural polymer modified mortar based on the citrus reticulata extract admixture comprises the following steps: firstly, mixing the citrus reticulata extract and the natural hydraulic lime to obtain lime paste, and then mixing the lime paste with the siliceous fine aggregate to obtain a mixture in a plastic state; and finally, grinding and standing to obtain the high-performance natural polymer modified mortar of the wood orange extract additive. The prepared modified mortar can significantly improve the compressive strength, bending strength and impermeability of the mortar, has the advantages of high compressive strength, high bending strength and clear and traceable raw material carbon footprint, and has the characteristics of renewable raw materials, low energy consumption production, high performance and long service life.

This invention relates to a nano-metakaolin-modified hydraulic lime-based composite material and its preparation and application. The composite material comprises natural hydraulic lime and nano-metakaolin dispersed in the natural hydraulic lime, wherein the mass ratio of natural hydraulic lime to nano-metakaolin is (60-90):(10-40). The nano-metakaolin-modified hydraulic lime-based composite material of this invention exhibits controllable dispersibility and fluidity in the slurry after mixing with water. It also demonstrates good rock compatibility, low soluble salt content, controllable curing time, suitable post-curing strength, low permeability, and low shrinkage and expansion rate. The presence of a repair agent can specifically enhance the additional protective performance of the reinforcement material. It possesses high applicability, safety, and durability for the protection of stone cultural relics, without causing derivative damage.

This invention belongs to the field of lime mortar technology and provides a silicon-titanium aerogel, a silicon-titanium aerogel-modified silane emulsion, its preparation method, and a superhydrophobic self-cleaning hydraulic lime mortar. The preparation method of the silicon-titanium aerogel of this invention includes the following steps: mixing silica sol and titanium dioxide sol to obtain a silicon-titanium cosol; sequentially allowing the silicon-titanium cosol to stand and age to obtain a gel; and subjecting the gel to supercritical carbon dioxide drying to obtain a dried silicon-titanium aerogel. This invention alters the physicochemical properties of the lime mortar surface through silica and surface chemical modification (such as silanes), thereby giving it superhydrophobic and self-cleaning properties; it maintains the traditional advantages of lime mortar, such as air permeability and environmental friendliness, while also significantly improving the mortar's waterproofness and stain resistance.

The invention discloses natural hydraulic lime-based mortar for cultural and cultural conservation building repair and a preparation method thereof, and belongs to the technical field of building materials, the mortar contains a microcapsule structure, is applied to cultural and cultural conservation building repair and has a water absorption swelling effect, and when the mortar is washed by rainwater, microcapsules can absorb water and swell to promote core layer substances to be released, so that the water absorption swelling effect is achieved; when the repairing layer is in contact with urea, urea is decomposed through urease to generate carbonate, and the carbonate is combined with calcium ions to form calcium carbonate precipitates, so that the cultural and cultural conservation building is reinforced under rain wash, and the situation that the repairing layer falls off due to long-term rain wash is avoided; the stripped calcium-based diatomite can be used as a silicon source to enhance the hydration effect of the natural hydraulic lime, the hydration effect can generate calcium silicate gel and ettringite on the surface of the cultural and cultural protection building, the ettringite is a needle-like substance, has expansibility and can be inserted into the gel to serve as an early reinforcing phase, and the expansion effect can extrude the microcapsules to promote the release of the microcapsules, so that the microcapsule release is promoted; the deposition of calcium carbonate is synergistically promoted.