34 results about "Expansive clay" patented technology

A method of producing a cationic asphalt slurry composition which can be used as an asphalt paving sealer or as a paving or repair composition. In the method and composition, latex and other polymers are used to build viscosity and a pH buffering filler is added to prevent flocculation. Consequently, the cationic composition can be stored without irreversibly settling or separating, and without breaking for several days prior to use. In addition, non-expansive clay and a polar polymer hardening agent are used so that, when applied, the composition will set and develop strength very quickly.

A method of reducing the swell potential of an expansive clayey soil comprising expansive clay mineral(s) at a proportion of the total weight of the expansive clayey soil (PECM). The method includes (a) calculating a first amount of a swelling reduction agent to be incorporated into the expansive clayey soil to form a first swelling reduction agent incorporated expansive clayey soil with a reduced swell potential no greater than a pre-set level T with a nano-level constitutive modeling based on the water content and the CEC of the expansive clayey soil and PECM. The swelling reduction agent is at least one selected from calcite, gypsum, potassium chloride, a composition comprising exchangeable K+, a composition comprising exchangeable Ca2, and / or a composition comprising exchangeable Mg2+, and (b) incorporating the first amount of the swelling reduction agent into the expansive clayey soil to form the first swelling reduction agent incorporated expansive clayey soil.

A regenerable sorbent for the removal of acid gas from a fluid stream. The regenerable sorbent is made from raw materials such as iron mineral, expansive clay and starch. Acid gas is removed from the fluid stream by a process where the raw materials are obtained, crushed, sifted, possibly pelletized, calcined and contacted with the fluid stream containing the acid gas.

A regenerable sorbent for the removal of acid gas from a fluid stream. The regenerable sorbent is made from raw materials such as iron mineral, expansive clay and starch. Acid gas is removed from the fluid stream by a process where the raw materials are obtained, crushed, sifted, possibly pelletized, calcined and contacted with the fluid stream containing the acid gas.

The invention relates to a method for measuring the adsorption performance of machine-made sandstone powder, which belongs to the technical field of civil engineering materials. Including: drying the machine-made sand to constant weight, adding a stone powder sieve for grading and sieving, and taking the stone powder at the bottom of the sieve for use; through the fluidity test of the mortar, it is determined that the fluidity of the benchmark group reaches the specified range at a low water-binder ratio The amount of water reducing agent; add the above-mentioned sieve bottom stone powder to the specified amount, carry out the mortar fluidity test according to the mortar mix ratio of the reference group, measure the fluidity of the rubber sand in the experimental group, and calculate the fluidity ratio according to the formula. Compared with the MB value of machine-made sand methylene blue, the assay method of the present invention has the characteristics of high efficiency, simple requirements for instruments and equipment, strong operational feasibility, and obvious distinction of test results, and the measurement results can better reflect whether the machine-made sand powder is There is an overall index of expansive clay minerals and their content, which has a better guiding role in controlling the content of mechanism sand and gravel powder.

The invention discloses an anti-seepage composite barrier, which comprises an anti-bypass seepage part and an anti-seepage layer, wherein the anti-bypass seepage part comprises a water soluble polymer membrane and expansive clay, the expansive clay is packaged in the water soluble polymer membrane, a groove is formed in the surface of the anti-bypass seepage part, and the bottom part of the anti-seepage layer is embedded in the groove of the anti-bypass seepage part. The anti-seepage composite barrier has the advantages that the construction is simple, the anti-seepage effect is good, and the problem of bypass seepage at the connecting part of a HDPE (high-density polyethylene) geomembrane and an underground impervious layer is solved.

The invention discloses a suspension stabilizer for concrete waste slurry concentrate and a preparation method thereof, and belongs to the technical field of concrete waste slurry concentration. %, water-soluble carbohydrates 5-15%, cellulose ether derivatives 1-3%, glycerol 60-75%, phosphate esterification reagent 15-25%, deionized water 2-5% and catalyst 0.5-3% %. The present invention uses expansive clay, water-soluble sugars, cellulose ether derivatives, glycerol and phosphoric acid esterification reagents as main raw materials, and under the action of a catalyst, the concrete waste slurry is prepared through the esterification reaction of hydroxyl groups and phosphoric acid groups Concentrate suspension stabilizer; through the synergistic effect of each component, the stability and homogeneity of concrete waste slurry concentrate during storage and application are significantly improved, and the phenomenon of exudate stratification and compaction is reduced.

The invention provides a structure and a method for processing a black cotton soil embankment with impervious geotextiles. The embankment structure comprises a geogrid gravelly soil base course, impervious geotextile edging and interlayer seepage-proofing layers, a black cotton soil fill stratum and a non-expansive clay top seal layer. The method comprises the following steps: (1) clearing a foundation; (2) setting out; (3) paving three layers of geogrid gravelly soil with the total thickness being 50cm; (4) spreading the impervious geotextiles on two sides of the road foundation, lapping the impervious geotextiles with filled soil by 250cm, turning up the impervious geotextiles on the slope of the road foundation, lapping the impervious geotextiles on the two sides in the middle of an embankment by 100cm after turning up, and bonding by using emulsified asphalt, wherein the lapping width of the adjacent impervious geotextiles is100cm and the impervious geotextiles are bonded by virtue of the emulsified asphalt; (5) spreading the soil and carrying out rolling construction; and (6) filling and rolling the top seal layer. The structure and the method disclosed by the invention are conducive to the stabilization of the embankment and are capable of preventing the embankment from deformation.

The invention discloses an amphiprotic-Gemini type cationic composite adsorbent, and a preparation method thereof. The amphiprotic-Gemini type cationic composite adsorbent is an expansive clay mineral modified by an amphiprotic surfactant and a Gemini type cationic surfactant; the amphiprotic surfactant is alkyl dimethyl betaine, and alkyl carbon chain of alkyl dimethyl betaine possesses 10 to 18 carbon atoms; the Gemini type cationic surfactant is an alkyl quaternary ammonium gemini surfactant, and alkyl carbon chain of the alkyl quaternary ammonium gemini surfactant possesses 10 to 18 carbon atoms. Adsorption capacities of the amphiprotic-Gemini type cationic composite adsorbent obtained via modification on organic pollutants and heavy metal anions are improved, so that a problem that absorption capacity of amphiprotic organic modified soil on pollutants and heavy metal anions is poor is solved. The preparation method of the amphiprotic-Gemini type cationic composite adsorbent is simple, and operation is convenient.