CN116041031A - In-situ treatment technology of engineering slag soil with high water content - Google Patents
In-situ treatment technology of engineering slag soil with high water content Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000002893 slag Substances 0.000 title claims abstract description 31
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 title claims description 35
- 238000005516 engineering process Methods 0.000 title abstract description 11
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 69
- 239000010440 gypsum Substances 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000010882 bottom ash Substances 0.000 claims abstract description 17
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 11
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000010936 titanium Substances 0.000 claims abstract description 11
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 11
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 150000004683 dihydrates Chemical class 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- -1 phosphogypsum dihydrate Chemical class 0.000 claims description 7
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- QWWIMOOFEDJKFN-UHFFFAOYSA-N titanium;dihydrate Chemical compound O.O.[Ti] QWWIMOOFEDJKFN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 5
- 230000015271 coagulation Effects 0.000 abstract description 4
- 238000005345 coagulation Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000003583 soil stabilizing agent Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- JAWMENYCRQKKJY-UHFFFAOYSA-N [3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-ylmethyl)-1-oxa-2,8-diazaspiro[4.5]dec-2-en-8-yl]-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]methanone Chemical compound N1N=NC=2CN(CCC=21)CC1=NOC2(C1)CCN(CC2)C(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F JAWMENYCRQKKJY-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00784—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes for disposal only
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Ceramic Engineering (AREA)
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Abstract
本发明提供一种高含水率渣土的原位处置方法,可用于处理含水率高于60%的工程渣土,具体为:通过未煅烧石膏与煅烧石膏的复合使用,大量吸收工程渣土中的水,同时使用炉底灰用降低高含水率渣土中水对固化材料的影响。本发明使用的石膏种类涉及钛石膏、磷石膏、脱硫石膏,涉及的石膏种类广泛,原料均为工业产物,固化材料中固废材料的使用率达到65%‑100%,减少了工业生产中固体废物的排放,具有环境友好的优点,是一种绿色建材;同时,使用本发明提供的工程渣土原位处置技术处理的渣土,其凝结时间快,凝结后强度较高,可以有效降低工程成本。
The invention provides an in-situ treatment method for high moisture content dregs, which can be used to treat engineering dregs with a moisture content higher than 60%, specifically: through the combined use of uncalcined gypsum and calcined gypsum, a large amount of engineering dregs is absorbed At the same time, the bottom ash is used to reduce the influence of water in the high moisture content slag on the solidified material. The types of gypsum used in the present invention relate to titanium gypsum, phosphogypsum, and desulfurized gypsum. The types of gypsum involved are extensive, and the raw materials are all industrial products. The utilization rate of solid waste materials in solidified materials reaches 65%-100%, which reduces the solid waste in industrial production. The discharge of waste has the advantage of being environmentally friendly and is a green building material; at the same time, the dregs processed by the in-situ disposal technology of engineering dregs provided by the present invention have fast coagulation time and high strength after coagulation, which can effectively reduce engineering waste. cost.
Description
技术领域technical field
本发明涉及工程渣土处理领域,具体而言,涉及一种高含水率工程渣土的原位处置技术及其应用。The invention relates to the field of engineering slag treatment, in particular to an in-situ disposal technology and application of high moisture content engineering slag.
背景技术Background technique
随着我国经济建设地不断发展和城市化建设地不断加快,工程渣土的排放量也在逐年增加,这已成为我国经济和社会发展的一大重担。在地基处理、抢修抢建等工程中,土的快速固化具有重要意义。针对低含水率土,当前建筑市场上的土壤固化剂种类颇多,固化时间一般在16-24小时,主要分为以下几种:With the continuous development of my country's economic construction and the continuous acceleration of urbanization, the discharge of engineering dregs is also increasing year by year, which has become a major burden for my country's economic and social development. The rapid solidification of soil is of great significance in foundation treatment, rush repair and rush construction and other projects. For soil with low moisture content, there are many types of soil curing agents currently on the construction market, and the curing time is generally 16-24 hours, which are mainly divided into the following types:
(1)以石灰和水泥为代表的传统无机固化剂;(1) Traditional inorganic curing agents represented by lime and cement;
(2)主要针对黏性土的离子土壤固化剂;(2) Ionic soil stabilizer mainly for clayey soil;
(3)由聚合物类、树脂类和高分子材料类等配制而成的有机土壤固化剂;(3) An organic soil stabilizer formulated from polymers, resins and macromolecular materials;
(4)由有机质发酵而成的生物酶类土壤固化剂。(4) Biological enzyme soil stabilizer made by fermenting organic matter.
不同作用机理的土壤固化剂在土壤力学性能、水稳性能、耐久性能及动力特性的应用效果不尽相同,并且现有的土壤固化剂存在施工周期长、含有潜在环境危害风险等问题。而针对高含水率渣土(含水率>60%),尚未有明晰的规范和统一材料对其进行处置。因此,如何对高含水率渣土进行原位快速固化转移是原位处置技术实施的关键环节。Soil stabilizers with different action mechanisms have different application effects on soil mechanical properties, water stability, durability and dynamic properties, and the existing soil stabilizers have problems such as long construction period and potential environmental hazards. However, for high moisture content muck (moisture content > 60%), there is no clear standard and unified material to deal with it. Therefore, how to carry out in-situ rapid solidification and transfer of high-moisture-content muck is a key link in the implementation of in-situ disposal technology.
近年来,由于天然优质石膏资源的枯竭,钛石膏、磷石膏和脱硫石膏作为工业副产石膏的重要组成部分,其资源再利用已成为石膏行业关注的重点。In recent years, due to the depletion of natural high-quality gypsum resources, titanium gypsum, phosphogypsum and desulfurized gypsum are important components of industrial by-product gypsum, and their resource reuse has become the focus of the gypsum industry.
公开号为CN102899048A的中国发明专利公开了一种脱硫石膏碱渣土壤固化剂,该固化剂由以下重量百分比的各组分制备:脱硫石膏12~30%,碱渣20~50%,矿渣0~30%,外加剂0~5%,粉煤灰0~20%。该发明以碱渣和矿渣为原料,制得的固化剂具有初凝时间短、抗压强度高的优点。但该固化剂严格限定了其中脱硫石膏的用量和碱渣的粒度,同时,该固化剂只能应用于含水率较低的土壤,无法应用于含水率较高的工程渣土,具有一定的局限性。The Chinese invention patent with the publication number CN102899048A discloses a desulfurization gypsum alkali slag soil curing agent, which is prepared from the following components in weight percentage: desulfurization gypsum 12-30%, alkali slag 20-50%, slag 0-50% 30%, admixture 0-5%, fly ash 0-20%. The invention uses alkali slag and slag as raw materials, and the prepared curing agent has the advantages of short initial setting time and high compressive strength. However, the curing agent strictly limits the amount of desulfurization gypsum and the particle size of alkali slag. At the same time, the curing agent can only be applied to soil with low moisture content, and cannot be applied to engineering dregs with high moisture content, which has certain limitations. sex.
公开号为CN113716927A的中国发明专利公开了一种磷石膏基土壤固化剂、制备方法与固化试样及其制备方法,该磷石膏基土壤固化剂包括改性磷石膏和活性组分,所述改性磷石膏与活性组分的质量比为1:(0.5-1.5),所述改性磷石膏由原状磷石膏和改性剂A在800-900℃温度下煅烧制得。该发明提供的土壤固化剂以PO 42.5水泥为土壤固化材料的土壤固化试样强度较高,但该土壤固化剂在制备过程中需要在800-900℃的条件下进行煅烧,制备过程较复杂,同时改固化剂固化土壤时土壤的含水量需要维持在较低水平(15wt-20wt%),而在实际施工生产过程中,工程渣土的含水量往往会大于该发明的水平,因此该固化剂在使用上也具有较大的局限性。The Chinese invention patent with the publication number CN113716927A discloses a phosphogypsum-based soil curing agent, a preparation method, a curing sample and a preparation method thereof. The phosphogypsum-based soil curing agent includes modified phosphogypsum and an active component, and the modified The mass ratio of active phosphogypsum to active components is 1: (0.5-1.5), and the modified phosphogypsum is obtained by calcining the original phosphogypsum and modifier A at a temperature of 800-900°C. The soil curing agent provided by the invention uses PO 42.5 cement as the soil curing sample strength of the soil curing material is higher, but the soil curing agent needs to be calcined at 800-900 ° C in the preparation process, and the preparation process is more complicated. Simultaneously, the water content of the soil needs to be maintained at a lower level (15wt-20wt%) when the solidifying agent is changed to solidify the soil, and in the actual construction production process, the water content of engineering dregs is often greater than the level of the invention, so the curing agent It also has great limitations in use.
综上所述,目前已有的利用单一石膏种类固化土壤的发明,其固化效果往往依赖于土壤颗粒度、含水量和有机质含量,针对高含水率土效果不佳,固化完成后结构中仍有大量孔隙存在,水稳性和耐久性较差,易出现收缩开裂现象。因此,开发一种针对高含水率土壤的原位处置方法具有较高的社会效益和经济效益。To sum up, the existing inventions that use a single type of gypsum to solidify soil often depend on the soil particle size, water content and organic matter content, and the effect is not good for soil with high water content. A large number of pores exist, the water stability and durability are poor, and shrinkage and cracking are prone to occur. Therefore, developing an in-situ disposal method for soils with high water content has high social and economic benefits.
发明内容Contents of the invention
本发明所要解决的问题是如何快速固化高含水率工程渣土。The problem to be solved by the invention is how to quickly solidify engineering dregs with high water content.
为解决上述问题,本发明提供一种高含水率工程渣土的原位处置方法,所述高含水率工程渣土的原位处置方法可用于处理含水率大于60%的工程渣土。In order to solve the above problems, the present invention provides an in-situ disposal method for high-moisture engineering dregs, which can be used to treat engineering dregs with a moisture content greater than 60%.
进一步地,本发明所述的高含水率工程渣土的原位处置方法包括如下步骤:Further, the in-situ disposal method of engineering dregs with high moisture content according to the present invention comprises the following steps:
S1、固化材料制备:按质量份计,使用5~30份未煅烧石膏、0~20份煅烧石膏、30~70份炉底灰、0~10份水玻璃混合制备固化材料;S1. Preparation of curing material: in parts by mass, use 5-30 parts of uncalcined gypsum, 0-20 parts of calcined gypsum, 30-70 parts of furnace bottom ash, and 0-10 parts of water glass to prepare the curing material;
S2、渣土固化:向含水率大于60%的工程渣土中掺入步骤S1制得的固化材料,混合均匀,静置,待工程渣土达到软塑状态后完成原位处置。S2. Solidification of dregs: Add the solidified material prepared in step S1 into the engineering dregs with a moisture content greater than 60%, mix evenly, let stand, and complete the in-situ disposal after the engineering dregs reach a soft plastic state.
优选地,所述步骤S1中,煅烧石膏、未煅烧石膏的质量之和与炉底灰质量的比例优选为(2~3):(6~7)。Preferably, in the step S1, the ratio of the sum of the mass of calcined gypsum and uncalcined gypsum to the mass of bottom ash is preferably (2-3):(6-7).
进一步地,所述步骤S1具体包括:将未煅烧石膏与煅烧石膏进行混合后搅拌均匀,加入炉底灰,搅拌均匀,加入水玻璃搅拌均匀后获得固化材料。Further, the step S1 specifically includes: mixing uncalcined gypsum and calcined gypsum and stirring evenly, adding furnace bottom ash, stirring evenly, adding water glass and stirring evenly to obtain a solidified material.
针对传统高含水率的工程渣土,工业上常使用晾晒的方法进行脱水后固化进行运输,但该方法耗时耗力,本发明所述的高含水率工程渣土的原位处置方法在处置高含水率的工程渣土时,无需对工程渣土进行晾晒脱水等操作,直接向高含水率的工程渣土中加入未煅烧石膏、煅烧石膏、炉底灰、水玻璃混合制成固化材料即可完成高含水率渣土的固化。For traditional high-moisture engineering dregs, the industry often uses the method of drying to dehydrate and solidify for transportation, but this method is time-consuming and labor-intensive. The in-situ disposal method for high-moisture engineering dregs described in the present invention is For engineering slag with high moisture content, there is no need to perform drying and dehydration operations on the engineering slag, and directly add uncalcined gypsum, calcined gypsum, furnace bottom ash, and water glass to the high moisture content engineering slag to make a solidified material. It can complete the solidification of high moisture content muck.
优选地,所述煅烧石膏选自半水钛石膏、半水磷石膏和半水脱硫石膏中的一种或多种。Preferably, the calcined gypsum is selected from one or more of titanium hemihydrate, phosphogypsum hemihydrate and desulfurized gypsum hemihydrate.
进一步地,所述煅烧石膏由二水钛石膏、二水磷石膏、二水脱硫石膏中一种或多种在180~250℃下煅烧2~5小时制得。Further, the calcined gypsum is prepared by calcining one or more of titanium dihydrate, phosphogypsum dihydrate and desulfurized gypsum dihydrate at 180-250° C. for 2-5 hours.
优选地,所述未煅烧石膏选自二水钛石膏、二水磷石膏和二水脱硫石膏中的一种或多种。Preferably, the uncalcined gypsum is selected from one or more of titanium dihydrate, phosphogypsum dihydrate and desulfurized gypsum dihydrate.
虽然石膏具有吸水性,但石膏的耐水性较差,向石膏中加入炉底灰,可提高石膏的耐水性,解决石膏耐水性差的问题,同时,炉底灰也具有一定的吸水能力,可提高固化材料的吸水性。Although gypsum has water absorption, the water resistance of gypsum is poor. Adding bottom ash to gypsum can improve the water resistance of gypsum and solve the problem of poor water resistance of gypsum. At the same time, bottom ash also has a certain water absorption capacity, which can improve Water absorption of cured material.
优选地,所述水玻璃的模数为1.0~1.5。。Preferably, the modulus of the water glass is 1.0-1.5. .
水玻璃是一种常用的粘结剂,在本发明中,水玻璃主要用于粘结工程渣土。Water glass is a kind of binding agent commonly used, and in the present invention, water glass is mainly used for bonding engineering slag.
进一步地,固化材料的质量为工程渣土质量的10%~30%。Further, the mass of the solidified material is 10% to 30% of the mass of engineering dregs.
优选地,所述步骤S2中,静置时间为2-12小时。Preferably, in the step S2, the standing time is 2-12 hours.
本发明的原理为:煅烧石膏在煅烧后吸水能力极强,以高含水率工程渣土中的水为反应水,使用煅烧石膏和非煅烧石膏的复配吸收水分,石膏在吸水后硬度会提升,从而使工程渣土固化、硬度提升。炉底灰可协助石膏吸收工程渣土中的水,解决石膏耐水性差的问题。The principle of the present invention is: the calcined gypsum has a very strong water absorption ability after calcined, and the water in the engineering dregs with high moisture content is used as the reaction water, and the compound of calcined gypsum and non-calcined gypsum is used to absorb water, and the hardness of the gypsum will increase after absorbing water , so that the engineering dregs are solidified and the hardness is improved. Bottom ash can assist gypsum to absorb water in engineering slag and solve the problem of poor water resistance of gypsum.
本发明具备的有益效果:本发明提供一种高含水率渣土的原位处置方法,可用于处理含水率高于60%的工程渣土,具体为:通过未煅烧石膏与煅烧石膏的复合使用,大量吸收工程渣土中的水,同时使用炉底灰用降低高含水率渣土中水对固化材料的影响。本发明使用的石膏种类涉及钛石膏、磷石膏、脱硫石膏,涉及的石膏种类广泛;本发明所用的原料均为工业产物,固化材料中固废材料的使用率达到90%以上,减少了工业生产中固体废物的排放,具有环境友好的优点,是一种绿色建材;同时,使用本发明提供的工程渣土原位处置技术处理的渣土,其凝结时间快,凝结后强度较高,可以有效降低工程成本。Beneficial effects of the present invention: the present invention provides an in-situ treatment method for high moisture content dregs, which can be used to treat engineering dregs with a moisture content higher than 60%, specifically: through the combined use of uncalcined gypsum and calcined gypsum , Absorb a large amount of water in engineering slag, and at the same time use bottom ash to reduce the impact of water in high moisture content slag on solidified materials. The types of gypsum used in the present invention relate to titanium gypsum, phosphogypsum, and desulfurized gypsum, and the types of gypsum involved are extensive; the raw materials used in the present invention are all industrial products, and the utilization rate of solid waste materials in solidified materials reaches more than 90%, which reduces industrial production The discharge of solid waste in the environment has the advantage of being environmentally friendly, and it is a green building material; at the same time, the dregs treated by the in-situ disposal technology of engineering dregs provided by the present invention have fast coagulation time and high strength after coagulation, which can effectively Reduce engineering costs.
附图说明Description of drawings
图1为本发明提出的高含水率渣土原位处置方法的流程图。Fig. 1 is a flow chart of the in-situ disposal method for high moisture content dregs proposed by the present invention.
具体实施方式Detailed ways
为使本发明的上述目的、特征和优点能够更为明显易懂,下面对本发明的具体实施例做详细的说明。需要说明的是,以下各实施例仅用于说明本发明的实施方法和典型参数,而不用于限定本发明所述的参数范围,由此引申出的合理变化,仍处于本发明权利要求的保护范围内。In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below. It should be noted that the following examples are only used to illustrate the implementation method and typical parameters of the present invention, and are not used to limit the scope of the parameters described in the present invention, and the reasonable changes derived from this are still protected by the claims of the present invention within range.
需要说明的是,在本文中所披露的范围的端点和任何值都不限于该精确的范围或值,这些范围或值应当理解为包含接近这些范围或值的值。对于数值范围来说,各个范围的端点值之间、各个范围的端点值和单独的点值之间,以及单独的点值之间可以彼此组合而得到一个或多个新的数值范围,这些数值范围应被视为在本文中具体公开。It should be noted that neither the endpoints of the ranges nor any values disclosed herein are limited to the precise ranges or values, and these ranges or values are understood to include values approaching these ranges or values. For numerical ranges, between the endpoints of each range, between the endpoints of each range and individual point values, and between individual point values can be combined with each other to obtain one or more new numerical ranges, these values Ranges should be considered as specifically disclosed herein.
为解决现有技术无法对含水率较高的工程渣土进行有效固化的问题,本发明具体实施方式提供了一种高含水率工程渣土原位处置技术及其应用,本发明提供的高含水率渣土原位处置技术包括:使用煅烧石膏与未煅烧石膏进行复配,可大量吸收工程渣土中的水分并硬化提高固结强度,施加炉底灰解决了石膏的耐水问题,水玻璃作为粘结剂可对工程渣土进行粘结。使用该方法In order to solve the problem that the existing technology cannot effectively solidify engineering dregs with high water content, the specific embodiment of the present invention provides an in-situ disposal technology and application of high water content engineering dregs. The in-situ treatment technology of high-rate slag includes: using calcined gypsum and uncalcined gypsum to compound, which can absorb a large amount of water in engineering slag and harden it to improve the consolidation strength. Applying furnace bottom ash solves the problem of water resistance of gypsum. Adhesives can bond engineering dregs. use this method
实施例1Example 1
其中称取半水钛石膏30份,二水磷石膏10份,二水脱硫石膏10份,炉底灰45份,水玻璃5份(模数1.0)混合均匀后成为固化材料。称取固化材料10份,70%含水率工程渣土90份进行混合。Among them, 30 parts of titanium gypsum hemihydrate, 10 parts of phosphogypsum dihydrate, 10 parts of desulfurized gypsum dihydrate, 45 parts of furnace bottom ash, and 5 parts of water glass (modulus 1.0) were weighed to form a solidified material after mixing evenly. Weigh 10 parts of solidified material and 90 parts of engineering dregs with 70% water content for mixing.
实施例2Example 2
称取半水钛石膏40份,二水磷石膏5份,二水脱硫石膏5份,炉底灰40份,水玻璃10份(模数1.0)混合均匀后成为固化材料。称取固化材料30份,90%含水率工程渣土70份进行混合。Weigh 40 parts of titanium gypsum hemihydrate, 5 parts of phosphogypsum dihydrate, 5 parts of desulfurized gypsum dihydrate, 40 parts of furnace bottom ash, and 10 parts of water glass (modulus 1.0) and mix them uniformly to form a solidified material. Weigh 30 parts of solidified material and 70 parts of engineering dregs with 90% water content for mixing.
实施例3Example 3
称取半水钛石膏30份,二水钛石膏10,二水磷石膏5份,二水脱硫石膏5份,炉底灰40份,水玻璃10份(模数1.0)混合均匀后成为固化材料。称取固化材料10份,70%含水率工程渣土90份。Weigh 30 parts of titanium gypsum hemihydrate, 10 parts of titanium gypsum dihydrate, 5 parts of phosphogypsum dihydrate, 5 parts of desulfurized gypsum dihydrate, 40 parts of furnace bottom ash, 10 parts of water glass (modulus 1.0) and mix them evenly to become a solidified material . Weigh 10 parts of solidified material and 90 parts of engineering dregs with 70% moisture content.
测定实施例1~实施例3工程渣土达可运状态所需时间。The time required for the construction dregs of Examples 1 to 3 to reach a transportable state was measured.
结果如表1所示。The results are shown in Table 1.
表1各实施例达可运状态所需时间Each embodiment of table 1 reaches the required time of transportable state
对三组实施例固化土样进行观察测定和比较,可以初步得出,影响固化稠度状态的固废材料主次关系为:炉底灰>未煅烧钛石膏>煅烧钛石膏>二水石膏>半水石膏。By observing, measuring and comparing the solidified soil samples of the three groups of examples, it can be preliminarily concluded that the primary and secondary relationship of solid waste materials affecting the solidified consistency state is: furnace bottom ash > uncalcined titanium gypsum > calcined titanium gypsum > dihydrate gypsum > semi water gypsum.
实施例4Example 4
测定实施例1-实施例3中工程渣土原位处置技术处理后的工程渣土的强度,步骤如下:Measure the strength of engineering dregs after engineering dregs in situ disposal technology in embodiment 1-embodiment 3, the steps are as follows:
步骤1:称取1000g干燥渣土,加入水使土壤含水率达到80%,搅拌后备用;Step 1: Weigh 1000g of dry muck, add water to make the moisture content of the soil reach 80%, stir and set aside;
步骤2:将实施例1~实施例3配制好的固化材料按照10%的质量分数加入高含水率土壤中,搅拌均匀;Step 2: Add the solidified material prepared in Examples 1 to 3 into the soil with high moisture content according to the mass fraction of 10%, and stir evenly;
步骤3:完成上述操作后,将土放置在40mm立方体试块模具内,用保鲜膜覆盖,放在阴凉处,表层覆盖湿毛巾,养护3d和7d,测试其无侧限抗压强度,结果见表2。Step 3: After completing the above operations, place the soil in a 40mm cube test block mold, cover it with plastic wrap, put it in a cool place, cover the surface with a wet towel, and test its unconfined compressive strength for 3d and 7d. The results are shown in Table 2.
实施例5Example 5
测定实施例1-实施例3中典型组工程渣土原位处置技术处理后的工程渣土的强度,步骤如下:Determination of the strength of engineering dregs after typical group of engineering dregs in-situ disposal technology in embodiment 1-embodiment 3, the steps are as follows:
步骤1:称取1000g干燥渣土,加入水使土壤含水率达到60%,搅拌后备用;Step 1: Weigh 1000g of dry muck, add water to make the soil moisture content reach 60%, stir and set aside;
步骤2:将配制好的固化材料按照10%的质量分数加入高含水率土壤中,搅拌均匀;Step 2: Add the prepared curing material into the soil with high moisture content according to the mass fraction of 10%, and stir evenly;
步骤3:完成上述操作后,将土放置在40mm立方体试块模具内,用保鲜膜覆盖,放在阴凉处,表层覆盖湿毛巾,养护3d和7d,测试其无侧限抗压强度,结果见表3。Step 3: After completing the above operations, place the soil in a 40mm cube test block mold, cover it with plastic wrap, put it in a cool place, cover the surface with a wet towel, and test its unconfined compressive strength for 3d and 7d. The results are shown in table 3.
结果显示,使用本发明提供的工程渣土原位处置技术处理的工程渣土,其7d抗压强度可达1MPa左右,强度较高。The results show that the 7d compressive strength of the engineering dregs processed by the in-situ disposal technology of the engineering dregs provided by the present invention can reach about 1 MPa, and the strength is relatively high.
虽然本公开披露如上,但本公开的保护范围并非仅限于此。本领域技术人员,在不脱离本公开的精神和范围的前提下,可进行各种变更与修改,这些变更与修改均将落入本发明的保护范围。Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present invention.
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