Special cementing material for preparing wear-resistant ultra-high performance concrete

[0023] Example 1 Preparation of high-speed iron Tall Selite sulkate cement cooled powder

[0024] According to the raw material weight ratio and ingredient value shown in Table 1, the ground is 0.08mm, and the screen is less than 8% of the raw material. After calcination by the rotary kiln 1310 ° C, it has obtained 0.74 tons (raw material fever High-speed rail Helpit sulfate cement cement clinker is 26%), and the grinding has a specific surface area of ​​400 ~ 450m. 2 / kg high-speed rail high-Relite sulkate cement clipe powder.

[0025] Table 1 Vereal ratio and ingredient value

[0026]

[0027] Mineral composition of high-speed rail Helpit sulumide cement clinker is shown in Table 2.

[0028] Table 2 High-speed rail Helpit sulumide cement clinker mineral composition

[0029]

[0030] According to standard GB17671-1999 "Cement Glue Strength Test Method (ISO Method)", GB / T1346-2011 "Water Consolidation, Coagulation Time, Stability Test Method" and JC / T421-2004 "Cement Sand Wear The physical properties of the measurement of high-speed high-speed high-speed high-Relite sully aluminate cement clinker are shown in Table 3.

[0031] Table 3 High-speed rail Helpite sulfate cement clinker physical properties

[0032]

[0033]

[0034] As can be seen from Table 3, the high-speed rail high-Penette sulkate cement clinker is very excellent in cement rubber sand wear resistance in the case of high physical strength and low demand, and the amount of wear is only 0.12kg. / M 2 Around, only 1/5 of ordinary silicate cement. Therefore, it is incorporated into the silicate cement clinker to form a dedicated gelling material to form a dedicated gelling material, which can significantly reduce the amount of glue sand wear of the gelling material to improve the wear resistance.

[0035]Example 2 Preparation of dedicated gelation materials

[0036] In accordance with the weight ratio shown in Table 4, the components were subjected to a dry powder mixer, and the special cement-resistant UHPC special cement was obtained.

[0037] Table 4 Dedicated gelling material weight ratio

[0038]

[0039] According to Standard GB17671-1999 "Cement Glue Strength Test Method (ISO Method)", GB / T1346-2011 "Water Consolidation, Coagulation Time, Stability Test Method", for the Standard of Cement Standards, for Physical Properties of Several Specialized Gel The measurement was carried out, and the test method of the cement rubber sand resistance was measured according to the JC / T421-2004 "Cement Glashed Wrunability Test Method" as shown in Table 5.

[0040] Table 5 Physical properties of dedicated gelation materials

[0041]

[0042]

[0043] As can be seen from Table 5, special gelation materials composed of silicate cement clinker, high-speed high-speed, high-Peletic sulfate cement clinker and appropriate amount of gypsum, is significantly higher than silicate cement, wear resistant Sex a significant increase in silicate cement has increased by 40% (28d rubber grinding value to about 40%), which provides reliable technical support for improving the wear-resistant UHPC material from gelling materials.

[0044] Example 3 Preparation of wear-resistant UHPC material

[0045] In this embodiment, the SiO in silicone ash 2 The content is greater than 95%, the specific surface area is not less than 20000m 2 / kg. Steel slag aggregate is a solid waste residue generated by metallurgical industries, crushing and sieving, making its particle size of ≥1.0mm and ≤3.0mm; tail ore sand, is a mining mine produced in iron ore distribution - Tailing mine, after drying and sorting, the particle size is ≥0.5 mm and ≤1.0mm; the quartz sand is a water washing dry sand having a particle size of ≤ 0.5 mm; the water reducer is highly efficient to polycarboxylic acid The aqueous agent, the water reduction rate is greater than 30%; the copper-plated steel fibers have a length of 10 mm to 15 mm and a diameter of 0.15 mm to 0.2 mm.

[0046] Group number 1:

[0047] According to the weight of the raw material components: special gelling material 650g; silica gray 150g; steel slag aggregate 620g; iron tail ore sand 350g; quartz sand 250g; water-plated steel fiber 80g; water plated steel fiber 80g; water 170g.

[0048] The preparation method is: the special gelation material, silica gray, steel slag aggregate, tail ore, quartz sand, stirred into the planetary mortar mixer for 2 minutes, make it uniform; mix the water reduction agent into the water, and make it The mixture was fully dissolved and mixed, and then stirred in the mixture for 3 minutes; and the copper-plated steel fibers were poured into the mixture for 2 minutes to obtain a wear-resistant UHPC mixture.

[0049] Group number 2:

[0050] According to the weight of each of the following weight: Sugalized particulate material 650g; silicon ash 120g; steel slag aggregate 600g; iron tail ore 350g; quartz sand 260g; water reducer 16g; Copper steel fiber 90g; water 160g.

[0051] The preparation method is: the special gelation material, silica gray, steel slag aggregate, tail ore, quartz sand, stirred into the planetary mortar mixer for 2 minutes, make it uniform; mix the water reduction agent into the water, and make it The mixture was fully dissolved and mixed, and then stirred in the mixture for 3 minutes; and the copper-plated steel fibers were poured into the mixture for 2 minutes to obtain a wear-resistant UHPC mixture.

[0052] Group number 3:

[0053] According to the weight of the raw material components according to the weight: Specialized gelling material 620g; silica gray 140g; steel slag aggregate 620g; iron tail ore 340g; quartz sand 240g; water reducer 18g; Copper steel fiber 100g; water 180g.

[0054] The preparation method is: the special gelation material, silica gray, steel slag aggregate, tail ore, quartz sand, stirred into the planetary mortar mixer for 2 minutes, make it uniform; mix the water reduction agent into the water, and make it The mixture was fully dissolved and mixed, and then stirred in the mixture for 3 minutes; and the copper-plated steel fibers were poured into the mixture for 2 minutes to obtain a wear-resistant UHPC mixture.

[0055] Group number 4:

[0056] According to the weight of each of the following weight: Timed the raw material components according to the following weight: special gelling material 600g; silica gray 120g; steel slag aggregate 650g; iron tail ore 300g; quartz sand 260g; water reducer 17g; Copper steel fiber 90g; water 175g.

[0057] The preparation method is: the special gelation material, silica gray, steel slag aggregate, tail ore, quartz sand, stirred into the planetary mortar mixer for 2 minutes, make it uniform; mix the water reduction agent into the water, and make it The mixture was fully dissolved and mixed, and then stirred in the mixture for 3 minutes; and the copper-plated steel fibers were poured into the mixture for 2 minutes to obtain a wear-resistant UHPC mixture.

[0058] Contrast 1 (ordinary UHPC):

[0059] According to the weight of each of the raw material components: silicate cement 800g; silica gray 140g; I grade powder coal ash 160g; copper-plated steel fiber 156g; water supply 7.5g; quartz sand 990g; water 185g.

[0060] The preparation method is to stir the silicate cement, silica gray, I grade fly ash, quartz sand, stirred into the planetary mortar mixer for 2 minutes, make it uniform; mix the water reducer into the water and make it fully dissolved And mixing, then poured into the mixture for 3 minutes; then poured into a copper-plated steel fiber in the mixture for 2 minutes to obtain a normal UHPC mixture.

[0061] Contrast 2 (wear-resistant ceramic coating):

[0062] According to the weight of the raw material components: silicate cement 760g; calcined aluminum aluminum bone aggregate 640g; 300g of brown jade aggregate; silicon carbide aggregate 300g; copper-plated steel fiber 10g; naphthalene water reducer 10g Water 220g.

[0063] The preparation method is to stir the silicate cement, calcined aluminum aluminous clinker, brown gruna aggregate, silicon carbide aggregate, poured into the planetary mortar mixer for 2 minutes, so that the naphthalene is reduced The agent was mixed into the water and dissolved and mixed well, and then poured into the mixture for 3 minutes; then poured into the copper-plated steel fiber in the mixture for 2 minutes to obtain a wear-resistant ceramic coating mixture.

[0064] The wear-resistant UHPCs and two contrast resistance of each group were measured, and the results were shown in Table 6. Wear resistance According to GB / T18301-2012 "Test method for normal temperature resistance of refractory materials", compressive strength and anti-fold intensity according to standard GB17671-1999 "Cement rubber strength test method (ISO method)" test, test block Take 40 mm × 40 mm × 160 mm prism.

[0065] Table 6 Physical properties of each group of wear-resistant UHPC

[0066]

[0067] As can be seen from Table 6, the special cement with the present invention is adopted by the matching of the solid waste aggregate and the wear-resistant HUPC prepared by the most closely stacked the design idea of ​​the powder material, compared to the existing wear material (contrast 2). In the case where wear resistance is reached or slightly optimal, the strength is greatly improved, and the 28D strength can be increased by about 50%, which is a great help for the impact resistance of the wear resistant material during the actual use, because of the cavity, The price of silicon carbide, calcined aluminum aluminous clinker, etc., the preparation cost of wear-resistant UHPC can be reduced relative to the wear-resistant ceramic coating, which can reduce 80%; compared to the existing ordinary UHPC material (contrast 1) In the case where the strength is basically the same, the abrasion resistance of the material is greatly improved, and the amount of wear can be reduced by about 55%.