CN118221364A - Method for preparing high-activity auxiliary cementing material by calcium-increasing thermal activation of sand washing mud - Google Patents
Method for preparing high-activity auxiliary cementing material by calcium-increasing thermal activation of sand washing mud Download PDFInfo
- Publication number
- CN118221364A CN118221364A CN202410475964.5A CN202410475964A CN118221364A CN 118221364 A CN118221364 A CN 118221364A CN 202410475964 A CN202410475964 A CN 202410475964A CN 118221364 A CN118221364 A CN 118221364A
- Authority
- CN
- China
- Prior art keywords
- sand washing
- washing mud
- calcium
- mud
- cementing material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 51
- 239000004576 sand Substances 0.000 title claims abstract description 46
- 238000005406 washing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 title claims abstract description 16
- 238000007725 thermal activation Methods 0.000 title description 8
- 239000000203 mixture Substances 0.000 claims abstract description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract 2
- 238000002156 mixing Methods 0.000 claims abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- 239000001110 calcium chloride Substances 0.000 claims description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 39
- 239000011499 joint compound Substances 0.000 description 31
- 239000004568 cement Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
技术领域Technical Field
本发明属于建筑材料、固体废弃物综合利用技术领域，具体涉及一种洗砂泥增钙热活化制备高活性辅助胶凝材料的方法。The invention belongs to the technical field of comprehensive utilization of building materials and solid wastes, and specifically relates to a method for preparing a high-activity auxiliary cementitious material by calcium-enhanced thermal activation of sand washing mud.
背景技术Background technique
机制砂在生产过程中不可避免地会产生粉体颗粒(石粉和泥粉)，对机制砂制备的混凝土品质产生负面影响。为了得到高品质机制砂，需要在制备过程中采用水洗的方式除去砂中的石粉和泥粉。据统计，每水洗1m3的机制砂，就需要4m3的水，产生的洗砂泥量大且难以处置，无论是直接排放还是堆放填埋，都将对环境产生严重的污染。因此，寻求有效地方法来安全管理、资源化利用洗砂泥是当前亟待解决的问题。During the production process of machine-made sand, powder particles (stone powder and mud powder) will inevitably be produced, which will have a negative impact on the quality of concrete prepared with machine-made sand. In order to obtain high-quality machine-made sand, it is necessary to use water washing to remove stone powder and mud powder from the sand during the preparation process. According to statistics, 4m3 of water is required for each 1m3 of machine-made sand washed. The amount of sand washing mud produced is large and difficult to dispose of. Whether it is directly discharged or piled up and landfilled, it will cause serious pollution to the environment. Therefore, seeking effective methods to safely manage and recycle sand washing mud is an urgent problem to be solved.
随着“交通强国”和“城市更新”等国家重大发展战略的深入推进，水泥混凝土的需求量巨大，导致传统辅助胶凝材料如粉煤灰、矿渣和硅灰等出现供不应求的现象，甚至部分地区出现无辅助胶凝材料可用的情况。因此，巨量的辅助胶凝材料市场为洗砂泥的高值化利用提供了新思路。在建筑材料中，辅助胶凝材料可用作水泥混合材制备水泥，也可用作混凝土掺合料制备混凝土。发明专利CN112960919A公开了一种利用洗砂污泥制备水泥混合材料的方法，采用5～15％的生石灰与洗砂污泥混合，混合料中掺入0.05～0.1％的助磨剂和2～5％的激发剂，在700～900℃煅烧，煅烧后再粉磨至通过45μm筛，制成水泥混合材。该方法制备的洗砂泥水泥混合材活性不高于76％，且在煅烧时需要加入助磨剂和激发剂等外加剂，煅烧后需要进行粉磨，增加了工业生产成本和难度。With the in-depth promotion of major national development strategies such as "Strong Transportation Country" and "Urban Renewal", the demand for cement concrete is huge, resulting in a shortage of traditional auxiliary cementitious materials such as fly ash, slag and silica fume, and even in some areas where there is no auxiliary cementitious material available. Therefore, the huge auxiliary cementitious material market provides a new idea for the high-value utilization of sand washing mud. In building materials, auxiliary cementitious materials can be used as cement admixtures to prepare cement, and can also be used as concrete admixtures to prepare concrete. Invention patent CN112960919A discloses a method for preparing cement admixtures using sand washing sludge, using 5-15% quicklime and sand washing sludge to mix, adding 0.05-0.1% grinding aid and 2-5% activator to the mixture, calcining at 700-900°C, and grinding to pass through a 45μm sieve after calcination to make a cement admixture. The activity of the washed sand mud cement mixture prepared by this method is no more than 76%, and additives such as grinding aids and activators need to be added during calcination. Powder grinding is required after calcination, which increases the cost and difficulty of industrial production.
发明内容Summary of the invention
本发明为了克服上述现有技术的不足，提供了一种洗砂泥增钙热活化制备高活性辅助胶凝材料的方法。本发明所得辅助胶凝材料的活性大于90％，且煅烧后无需粉磨，大大降低了生产能耗。In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a method for preparing a high-activity auxiliary cementitious material by calcium-enhanced thermal activation of sand washing mud. The activity of the auxiliary cementitious material obtained by the present invention is greater than 90%, and no grinding is required after calcination, which greatly reduces production energy consumption.
本发明洗砂泥增钙热活化制备高活性辅助胶凝材料的方法，包括如下步骤：The method for preparing a high-activity auxiliary cementitious material by calcium-enhanced thermal activation of sand washing mud of the present invention comprises the following steps:
步骤1：将干燥后的洗砂泥、钙质材料和矿化剂混合，得到混合料A；Step 1: Mix the dried sand washing mud, calcium material and mineralizer to obtain a mixture A;
步骤2：将步骤1得到的混合料A输送到高温炉中，升温至800～900℃，保温60～120min，得到充分反应的煅烧产物；Step 2: transporting the mixed material A obtained in step 1 to a high temperature furnace, heating it to 800-900° C., and keeping it at that temperature for 60-120 minutes to obtain a fully reacted calcined product;
步骤3：将步骤2所得煅烧产物冷却至室温后，即得辅助胶凝材料。Step 3: After the calcined product obtained in step 2 is cooled to room temperature, the auxiliary gelling material is obtained.
优选地，所述洗砂泥的粒径≤150μm，所述钙质材料的粒径≤75μm。Preferably, the particle size of the sand washing mud is ≤150 μm, and the particle size of the calcareous material is ≤75 μm.
优选地，所述钙质材料选自石灰石粉、白云石粉、碳酸钙中的一种。Preferably, the calcareous material is selected from one of limestone powder, dolomite powder and calcium carbonate.
优选地，所述矿化剂选自氟化钙、氯化钙、石膏中的一种。Preferably, the mineralizer is selected from one of calcium fluoride, calcium chloride and gypsum.
进一步，钙质材料与洗砂泥的质量百分比为：钙质材料15～30％，洗砂泥70～85％，二者质量之和为100％。Furthermore, the mass percentages of the calcareous material and the sand washing mud are: 15-30% of the calcareous material and 70-85% of the sand washing mud, and the sum of the masses of the two is 100%.
进一步，矿化剂的添加质量为钙质材料与洗砂泥总质量的1～5％。Furthermore, the added mass of the mineralizer is 1 to 5% of the total mass of the calcareous material and the sand washing mud.
本发明的技术原理为：The technical principle of the present invention is:
通过在洗砂泥中掺加钙质材料和矿化剂，在800～900℃温度下煅烧，首先洗砂泥中黏土矿物脱水，并由晶态有序结构变成非晶态无定型结构；其次，在碳酸钙分解时，均匀分布的矿化剂已经处于熔融态，推动物相的低温分解和氧化钙在洗砂泥颗粒表面的结合，加快破坏矿物相的硅氧、铝氧等结构；最后，氧化钙与体系中的活性氧化硅、氧化铝反应生成硅酸盐矿物，提升了反应活性。此外，由于洗砂泥在增钙热活化过程中部分矿物结构膨胀破坏、成分挥发，导致矿物分解，大大减小粒径，活化洗砂泥无须进一步研磨。By adding calcium materials and mineralizers to the sand washing mud and calcining it at 800-900°C, the clay minerals in the sand washing mud are first dehydrated and the crystalline ordered structure is changed into an amorphous amorphous structure; secondly, when calcium carbonate decomposes, the evenly distributed mineralizer is already in a molten state, which promotes the low-temperature decomposition of the physical phase and the combination of calcium oxide on the surface of the sand washing mud particles, accelerating the destruction of the silicon oxygen, aluminum oxygen and other structures of the mineral phase; finally, calcium oxide reacts with the active silicon oxide and aluminum oxide in the system to form silicate minerals, which improves the reaction activity. In addition, due to the expansion and destruction of some mineral structures and volatilization of components during the calcium-added thermal activation process, the mineral decomposition is caused, which greatly reduces the particle size, and the activated sand washing mud does not need to be further ground.
本发明的有益效果体现在：The beneficial effects of the present invention are embodied in:
(1)本发明通过增钙热活化方法得到的辅助胶凝材料，活性指数可达90％以上，可实现洗砂泥的高值化利用；(1) The auxiliary cementitious material obtained by the calcium-added thermal activation method of the present invention has an activity index of more than 90%, which can realize the high-value utilization of sand washing mud;
(2)本发明通过对洗砂泥增钙热活化制备的辅助胶凝材料，不用在煅烧后进行粉磨，可显著降低能耗。(2) The auxiliary cementitious material prepared by the present invention through thermal activation of calcium-added sand washing mud does not need to be ground after calcination, which can significantly reduce energy consumption.
因此，本发明不仅可高值化利用洗砂泥，提供一种制备高活性辅助胶凝材料的方法，而且精简制备工艺，有效降低辅助胶凝材料生产对资源、能源的消耗和对环境的污染，有利于推动建材产业的绿色可持续发展。Therefore, the present invention can not only make high-value use of sand washing mud and provide a method for preparing high-activity auxiliary cementitious materials, but also streamline the preparation process, effectively reduce the consumption of resources and energy and pollution to the environment in the production of auxiliary cementitious materials, and is conducive to promoting the green and sustainable development of the building materials industry.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
构成本发明一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.
图1为对比例1、2和实施例1、2制备的辅助胶凝材料的XRD图谱。FIG. 1 is an XRD spectrum of the auxiliary gelling materials prepared in Comparative Examples 1 and 2 and Examples 1 and 2.
具体实施方式Detailed ways
下面结合实施例，对本发明的具体实施方式进行详细说明。应当理解的是，此处描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。The specific embodiments of the present invention are described in detail below in conjunction with the examples. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
实施例1：Embodiment 1:
将烘干后的洗砂泥、碳酸钙和氯化钙以85:15:3的质量比充分混合，得到混合料；然后把混合料置于高温炉中，升温至800℃，保温90min后，得到煅烧产物；煅烧产物冷却至室温，即得辅助胶凝材料。The dried sand washing mud, calcium carbonate and calcium chloride are fully mixed in a mass ratio of 85:15:3 to obtain a mixture; then the mixture is placed in a high-temperature furnace, heated to 800°C, and kept warm for 90 minutes to obtain a calcined product; the calcined product is cooled to room temperature to obtain an auxiliary cementitious material.
实施例2：Embodiment 2:
将烘干后的洗砂泥、碳酸钙和氯化钙以70:30:3的质量比充分混合，得到混合料；然后把混合料置于高温炉中，升温至800℃，保温90min后，得到煅烧产物；煅烧产物冷却至室温，即得辅助胶凝材料。The dried sand washing mud, calcium carbonate and calcium chloride are fully mixed in a mass ratio of 70:30:3 to obtain a mixture; then the mixture is placed in a high-temperature furnace, heated to 800°C, and kept warm for 90 minutes to obtain a calcined product; the calcined product is cooled to room temperature to obtain an auxiliary cementitious material.
实施例3：Embodiment 3:
将烘干后的洗砂泥、石灰石粉和氟化钙以70:30:3的质量比充分混合，得到混合料；然后把混合料置于高温炉中，升温至900℃，保温60min后，得到煅烧产物；煅烧产物冷却至室温，即得辅助胶凝材料。The dried washed sand mud, limestone powder and calcium fluoride are fully mixed in a mass ratio of 70:30:3 to obtain a mixture; then the mixture is placed in a high-temperature furnace, heated to 900°C, and kept warm for 60 minutes to obtain a calcined product; the calcined product is cooled to room temperature to obtain an auxiliary cementitious material.
实施例4：Embodiment 4:
将烘干后的洗砂泥、白云石粉和氯化钙以70:30:3的质量比充分混合，得到混合料；然后把混合料置于高温炉中，升温至900℃，保温120min后，得到煅烧产物；煅烧产物冷却至室温，即得辅助胶凝材料。The dried washed sand mud, dolomite powder and calcium chloride are fully mixed in a mass ratio of 70:30:3 to obtain a mixture; then the mixture is placed in a high-temperature furnace, heated to 900°C, and kept warm for 120 minutes to obtain a calcined product; the calcined product is cooled to room temperature to obtain an auxiliary cementitious material.
实施例5：Embodiment 5:
将烘干后的洗砂泥、碳酸钙和石膏以70:30:3的质量比充分混合，得到混合料；然后把混合料置于高温炉中，升温至900℃，保温120min后，得到煅烧产物；煅烧产物冷却至室温，即得辅助胶凝材料。The dried washed sand mud, calcium carbonate and gypsum are fully mixed in a mass ratio of 70:30:3 to obtain a mixture; then the mixture is placed in a high-temperature furnace, heated to 900°C, and kept warm for 120 minutes to obtain a calcined product; the calcined product is cooled to room temperature to obtain an auxiliary cementitious material.
对比例1：Comparative Example 1:
区别于上述实施例，提供了一种洗砂泥热活化制备辅助胶凝材料。将烘干后的洗砂泥置于高温炉中，升温至800℃，保温120min后，得到煅烧产物；煅烧产物冷却至室温，即得辅助胶凝材料。Different from the above embodiment, a method for preparing auxiliary gelling material by thermal activation of sand washing mud is provided. The dried sand washing mud is placed in a high temperature furnace, heated to 800°C, and kept warm for 120 minutes to obtain a calcined product; the calcined product is cooled to room temperature to obtain an auxiliary gelling material.
对比例2：Comparative Example 2:
区别于上述实施例，将烘干后的洗砂泥作为辅助胶凝材料。Different from the above-mentioned embodiment, the dried washed sand mud is used as an auxiliary cementitious material.
按照粉煤灰和钢渣等常用辅助胶凝材料的活性指数检测标准，对以上实施例所得辅助胶凝材料进行检测，测试结果如表2所示。According to the activity index test standard of common auxiliary cementitious materials such as fly ash and steel slag, the auxiliary cementitious materials obtained in the above examples were tested, and the test results are shown in Table 2.
表2各组试样的活性指数Table 2 Activity index of each group of samples
由表2可知，采用本发明实施例1～5制备的辅助胶凝材料活性指数均大于90％，优于发明专利CN112960919A中的76％，且远大于粉煤灰和钢渣等常用辅助胶凝材料的合格标准。此外，本发明不仅可以制备出高活性的辅助胶凝材料，而且减去了粉磨工序，降低了生产成本，具有社会效益和环境效益。As can be seen from Table 2, the activity index of the auxiliary cementitious materials prepared by using Examples 1 to 5 of the present invention is greater than 90%, which is better than 76% in the invention patent CN112960919A, and is much greater than the qualified standards of common auxiliary cementitious materials such as fly ash and steel slag. In addition, the present invention can not only prepare highly active auxiliary cementitious materials, but also eliminate the grinding process, reduce production costs, and have social and environmental benefits.
由图1可知，本发明制备的辅助胶凝材料的矿物相衍射峰强度明显减弱，表明活化洗砂泥的无序结构明显增强。同时，由于钙质材料和矿化剂的分解，与洗砂泥中活性SiO2和Al2O3生成新的活性硅酸盐矿物，增强了辅助胶凝材料的活性。As shown in Figure 1, the diffraction peak intensity of the mineral phase of the auxiliary cementitious material prepared by the present invention is significantly weakened, indicating that the disordered structure of the activated sand washing mud is significantly enhanced. At the same time, due to the decomposition of the calcareous material and the mineralizer, new active silicate minerals are generated with the active SiO2 and Al2O3 in the sand washing mud, which enhances the activity of the auxiliary cementitious material.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410475964.5A CN118221364A (en) | 2024-04-19 | 2024-04-19 | Method for preparing high-activity auxiliary cementing material by calcium-increasing thermal activation of sand washing mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410475964.5A CN118221364A (en) | 2024-04-19 | 2024-04-19 | Method for preparing high-activity auxiliary cementing material by calcium-increasing thermal activation of sand washing mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118221364A true CN118221364A (en) | 2024-06-21 |
Family
ID=91503996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410475964.5A Pending CN118221364A (en) | 2024-04-19 | 2024-04-19 | Method for preparing high-activity auxiliary cementing material by calcium-increasing thermal activation of sand washing mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118221364A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118619579A (en) * | 2024-08-12 | 2024-09-10 | 浙江天造环保科技有限公司 | A cement-based material admixture based on machine-made sand tailings and a preparation method thereof |
-
2024
- 2024-04-19 CN CN202410475964.5A patent/CN118221364A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118619579A (en) * | 2024-08-12 | 2024-09-10 | 浙江天造环保科技有限公司 | A cement-based material admixture based on machine-made sand tailings and a preparation method thereof |
| CN118619579B (en) * | 2024-08-12 | 2025-01-28 | 浙江天造环保科技有限公司 | A cement-based material admixture based on machine-made sand tailings and a preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110204258B (en) | Full-solid waste baking-free foamed concrete based on tail gas carbonization and preparation method and application thereof | |
| CN112125541A (en) | Method for regenerating fine powder of waste concrete by wet carbonization activation and application of regenerated fine powder | |
| CN112608043B (en) | A kind of high-strength nickel slag-based solid waste cementitious material and preparation method thereof | |
| CN108821621B (en) | Light high-strength ceramsite and preparation method thereof | |
| CN112266264A (en) | Aerated concrete based on synergistic effect of alkali excitation and accelerated carbonization and preparation method thereof | |
| CN113603440B (en) | Non-fired water permeable brick based on granite waste and coal slag and preparation method thereof | |
| CN111635152A (en) | High belite sulphoaluminate cement clinker and preparation method thereof | |
| CN112794683B (en) | A kind of waste concrete-based recycled cementitious material and preparation method thereof | |
| CN118221364A (en) | Method for preparing high-activity auxiliary cementing material by calcium-increasing thermal activation of sand washing mud | |
| CN117645420A (en) | Carbonation hardening low-calcium cement and preparation and hardening method thereof | |
| CN116332548B (en) | Phosphorus slag-based wet carbon fixation slurry, preparation method thereof and carbon-sealed concrete | |
| CN115028395B (en) | A kind of solid waste building material product and preparation method thereof | |
| CN117185690A (en) | Lithium slag-based baking-free light ceramsite and preparation method and application thereof | |
| CN116102281B (en) | Method for rapid preparation of high-activity mixed material by using shield-dried soil at low temperature, and the prepared high-activity mixed material and its application | |
| CN111718141A (en) | Method for preparing artificial high-strength lightweight aggregate by crushing concrete slag powder | |
| CN108083644B (en) | A method for preparing glass-ceramics by using molten blast furnace slag | |
| CN117001553A (en) | Method for preparing ceramic bond grinding wheel by using coal gangue through geopolymerization reaction | |
| CN114920473A (en) | A kind of multi-component low-carbon low-clinker composite cement and preparation method thereof | |
| CN114890702A (en) | Method for preparing high-strength ceramsite by self-sintering coal gasification fine slag | |
| CN114573318A (en) | Special mixture for aerated concrete and preparation method thereof | |
| CN112279677A (en) | High-doping-amount municipal sludge foamed ceramic and preparation method thereof | |
| CN110143770A (en) | A kind of preparation method of ternary composite inorganic gelling material of current exhaust furnace slag | |
| CN115304296B (en) | Recyclable cement and preparation method thereof | |
| CN113788659B (en) | Building mortar and preparation method thereof | |
| CN114656172B (en) | Red mud-based cementing material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |