CN103833297A - High performance cement soil and preparation method thereof - Google Patents
High performance cement soil and preparation method thereof Download PDFInfo
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Abstract
The invention discloses high performance cement soil and a preparation method thereof, which belongs to the field of civil engineering materials. Natural fibers and nano-materials are used synergistically to improve the performance of cement soil. The preparation method of the high performance cement soil of the invention comprises the following steps: drying, crushing, and sieving natural soil to obtain dry and fine natural soil; performing ultrasonic bonding of natural fibers and nano-materials to prepare a composite material of nano-materials and natural fibers, drying the composite material; adding the dried composite material of nano-materials and natural fibers into the dry and fine natural soil, adding water, uniformly stirring, putting the mixed soil in a wet container; adding cement and water into the mixed soil, and uniformly stirring to obtain the high performance cement soil. The preparation method of the invention greatly improves the toughness and strength of cement soil, and effectively solves the toughness or strength defects of cement soil caused by single addition of additives or fibers, and the prepared high performance cement soil is widely applicable to subgrade engineering, slope protection engineering, ground stabilization engineering and the like.
Description
Technical field
The present invention relates to civil engineering material technical field, be specifically related to a kind of high-performance cement soil and preparation method thereof, natural fiber and nano material are had to effective adhesive with ultrasonic technology, in cement-earth, the effect that is similar to Ribbed Bar in concrete can be played, toughness and the intensity of cement-earth can be effectively improved.
Background technology
As far back as 1915, the U.S. created cement-earth material first.Because earth material is gathered materials on the spot, cost is lower, the advantage such as convenient of constructing, in decades afterwards, cement-earth is widely used, and develops into foundation stabilization, the maintenance of slope of highway etc. of soft clay area from single road construction work.But by lower with cement-earth specific tenacity, cause the large-scale application of cement-earth also to suffer restriction, some engineering construction continues to use concrete material in order to meet requirement of strength, has made engineering cost costliness many, and the pollution causing is also more serious.
Based on above reason, people more and more pay close attention to the research of soil cement intensity, by the analysis of Influential Factors to soil cement intensity, the method of some reinforcement soil cement intensities has been proposed, as increase cement consumption, improve cement strength grade, improve cement-earth degree of compactness, take special maintenance process, mix single or compound additive etc., its effect is different, and some method causes the increase of material cost, environmental pollution larger to a great extent.
There is it from ancient times, people mix straw, husk etc. and improve the strength and stability of wall in mud wall, it can be regarded as to the blank of reinforced concrete soil, along with people's practical experience increase and the consolidation of theoretical analysis, Steel Concrete, fiber reinforcement type concrete etc. occur thereupon.
But, the document of now having delivered and and patent adopt admixture more and carry out refinforced cement soil intensity, it easily causes the fragility of cement-earth to increase; Or adopt glass fibre, polypropylene fibre to improve the toughness of cement-earth, and pass through the ultimate compression strength decrease to some degree of verification experimental verification cement-earth.
Summary of the invention
In order to solve the contradiction between existing cement-earth toughness and intensity, the object of the present invention is to provide a kind of high-performance cement soil and preparation method thereof, can be widely used in subgrade engineering, slope protection works, Base Consolidation Engineering and other civil engineering works etc.
To achieve these goals, technical scheme of the present invention is as follows:
A preparation method for high-performance cement soil, concrete preparation method comprises the steps:
(1) natural fiber is mixed by the weight ratio of 1:1～10 with nano material, supersound process makes natural fiber and nano material bonding, dry, obtains nano material natural-fiber composite material;
(2) take raw material by following weight percent: dry thin natural earth material: 70%～90%; Cement: 5%～25%; Nano material natural-fiber composite material: 1%～10%;
(3) nano material natural-fiber composite material is added in dry thin natural earth material, stir, add water and stir subsequently, the quality of the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(4) take out the compound in container, add cement and water to stir, obtain high-performance cement soil, the quality of the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
Nano material in step (1) is preferably inorganic nano material, more preferably nano silica fume, nano-aluminium oxide, nano calcium hydroxide, nanometer gypsum or nanometer water glass.
Natural fiber in step (1) is vegetable fibre or animal fibre, and the diameter of natural fiber is 0.01 μ m～100 μ m, and length is 0.1mm～100mm.
Above-mentioned vegetable fibre is seed hair, phloem fiber, leaf fiber or fruit fibre etc.; Animal fibre is chitin fiber in wire protein fiber, the shrimp crab of keratin fiber, silk and the spider silk of animal hair or the collagen fabric of fish scale class.
In step (1), the ultrasonic time is 10min～300min, and the frequency of ultrasonic adopted ultrasonic unit is 10KHz～10MHz, and power is 10W～2KW.
The dry time of step (1) is 10min～60min, and temperature is 30 DEG C～100 DEG C.
In step (2), dry thin natural earth material is to be prepared from by the following method: the natural earth material that is 4～10 by pH value uses rotary dryer to process 5min～60min at 40 DEG C～110 DEG C, and the power of this dryer is that 3KW～75KW, rotating speed are 1r/min～10r/min; Then use square hole sieve or round hole sieve processing that diameter is 0.075mm～30mm, obtain dry thin natural earth material.
High-performance cement soil prepared by above-mentioned preparation method.
Beneficial effect of the present invention is as follows:
(1) general cement-earth initial stage cement hydrolysis aquation is incomplete, if cement-soil with fiber is subject to load, the easy generating portion relative displacement of fiber and cement-earth, and nano material natural-fiber composite material is added after cement-earth, surface adhesion has the natural fiber of nano material can regard " Ribbed Bar " as, and nano material natural fiber composition material can effectively stop because being subject to load and produces relative slippage.And along with the carrying out of cement hydrolysis aquation, the calcium hydroxide reaction that nano material and cement hydrolysis aquation generate can generate hydrated calcium silicate etc., can substitute nano material natural fiber and the cement-earth of boning that remain valid, the intensity of cement-earth can also be increased, the defect adding separately in toughness or the intensity of bringing to cement-earth after admixture or fiber can be effectively solved.
(2) the present invention is applicable wide, as long as have natural fiber and the nano material of different scale hierarchy, all can adopt the present invention to prepare high-performance cement soil.
(3) the present invention prepares natural fiber abundant raw material in material, easily processing, energy-conserving and environment-protective.
(4) the high-performance cement soil intensity that prepared by the present invention is adjustable, no matter is intensity or a certain endurance quality of high-performance cement soil, all can from raw material composition and ratio, suitably adjust, to meet requirement of engineering.
(5) the present invention uses rotary dryer is passed to natural earth material by warm air or hot flue gas by heat, make moisture evaporation, rely on the effect of ventilation installation simultaneously, natural earth material in drying plant is constantly updated, to get rid of steam, more efficiency natural earth material is dried, the dry ground material the obtaining impurity elimination that grinds, sieves is obtained to dry fine earth material.A set of like this operation can make the nano material natural fiber adding be evenly dispersed in dry fine earth material after stirring, and makes the stable performance of nano material natural fiber cement-earth.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail, but protection domain not thereby limiting the invention.
The ultrasonic wave device for dissociation specification that following embodiment adopts is: frequency 10KHz, peak power is 900W.Obviously, can also adopt in the present invention other can produce satisfactory frequency is the ultrasonic equipment that 10KHz～10MHz, power are 10W～2KW, and similarly equipment also has ultrasonic wave nanometer to have the ultrasonic wave class device of ultrasonic generator and ultrasonic vibration system from standby host, ultrasonic oscillator, ultrasonic wave refiner etc.
The rotating speed of the rotary dryer that following embodiment adopts is 8r/min, and power is 8KW.Obviously, can also adopt in the present invention other rotating speeds that can dry earth material is the rotary dryer that 1r/min～10r/min and power are 3KW～75KW, and similarly equipment also has liquid stream dryer, flow-type dryer etc. to have the dryer of dry earth material function.
The aperture of the square hole sieve that following embodiment adopts is 5mm.Obviously, can also adopt in the present invention other apertures is square hole sieve or the round hole sieve of 0.075mm～30mm.
Embodiment 1
The concrete preparation process of high-performance cement soil is as follows:
(1) the natural earth material that is 4～10 by the pH value on Tsing-Hua University meadow is put into rotary dryer, at 40 DEG C, processes 60min, dries and obtains dry ground material, and the square hole sieve that is 5mm by aperture after dry ground material is pulverized on pulverizer obtains dry thin natural earth material;
(2) according to weight ratio 1:1, diameter being about to silk fiber and the nano silica fume that 20 μ m, length are about 20mm mixes, put into the ultrasonic bonding of ultrasonic wave device for dissociation 10min, after taking-up, in the baking oven of 30 DEG C, be dried 60min, obtain nano silica fume silk fibre composites;
(3) take raw material by following weight percent: dry thin natural earth material: 70%; Strength grade is 42.5 ordinary Portland cement: 20%; Nano silica fume silk fibre composites: 10%;
(4) nano silica fume silk fibre composites is added in dry thin natural earth material, stir, add subsequently water, stir, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(5) take out the compound in container in step (4), add cement and water, stir, obtain high-performance cement soil, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
Implementation result: high-performance cement soil prepared by the present embodiment, compared with the conventional cement-earth that is 7:2 with the weight ratio of dry thin natural earth material, cement, after 7 days, its toughness has improved 64%, and ultimate compression strength has improved 17%, and tensile strength has improved 46%; After 28 days, its toughness has improved 81%, and ultimate compression strength has improved 19%, and tensile strength has improved 58%.
Compared with the silk fiber cement-earth of the weight ratio 7:2:1 of dry thin natural earth material, cement, silk fiber, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 3%, and ultimate compression strength has improved 2%, and tensile strength has improved 3%; After 28 days, its toughness has improved 7%, and ultimate compression strength has improved 3%, and tensile strength has improved 11%.
And compared with the Soil-cement Mixed with Nanometer Silica Powder that is 7:2:1 with the weight ratio of dry thin natural earth material, cement, nano silica fume, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 17%, ultimate compression strength has improved 9%, and tensile strength has improved 16%; After 28 days, its toughness has improved 45%, and ultimate compression strength has improved 12%, and tensile strength has heightened 22%.
Embodiment 2
The concrete preparation process of high-performance cement soil is as follows:
(1) the natural earth material that is 4～10 by the pH value on Tsing-Hua University meadow is put into rotary dryer, at 50 DEG C, processes 40min, dries and obtains dry ground material, and the square hole sieve that is 5mm by aperture after dry ground material is pulverized on pulverizer obtains dry thin natural earth material;
(2) according to weight ratio 1:3, diameter being about to leaf fiber and the nanometer gypsum that 10 μ m, length are about 30mm mixes, put into the ultrasonic bonding of ultrasonic wave device for dissociation 60min, after taking-up, in the baking oven of 40 DEG C, be dried 50min, obtain nanometer gypsum leaf fibres matrix material;
(3) take raw material by following weight percent: dry thin natural earth material: 75%; Strength grade is 42.5 ordinary Portland cement: 17%; Nanometer gypsum plant leaf fibres matrix material: 8%;
(4) nano silica fume silk fibre composites is added in dry thin natural earth material, stir, add subsequently water, stir, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(5) take out the compound in container in step (4), add cement and water, stir, obtain high-performance cement soil, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
Implementation result: high-performance cement soil prepared by the present embodiment, compared with the conventional cement-earth that is 5:1 with the weight ratio of dry thin natural earth material, cement, after 7 days, its toughness has improved 58%, and ultimate compression strength has improved 12%, and tensile strength has improved 42%; After 28 days, its toughness has improved 63%, and ultimate compression strength has improved 17%, and tensile strength has improved 51%.
Compared with the leaf cement-soil with fiber that is 75:17:8 with the weight ratio of dry thin natural earth material, cement, leaf fiber, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 3%, and ultimate compression strength has improved 5%, and tensile strength has improved 4%; After 28 days, its toughness has improved 7%, and ultimate compression strength has improved 3%, and tensile strength has improved 11%.
And with the weight ratio of dry thin natural earth material, cement, the nanometer gypsum nanometer gypsum cement soil phase ratio that is 75:17:8, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 15%, ultimate compression strength has improved 4%, tensile strength has improved 13%; After 28 days, its toughness has improved 45%, and ultimate compression strength has improved 7%, and tensile strength has heightened 18%.
Embodiment 3
The concrete preparation process of high-performance cement soil is as follows:
(1) the natural earth material that is 4～10 by the pH value on Tsing-Hua University meadow is put into rotary dryer, processes 30min at 60 DEG C, dries and obtains dry ground material, and the square hole sieve that is 5mm by aperture after dry ground material is pulverized on pulverizer obtains dry thin natural earth material;
(2) according to weight ratio 1:5 by diameter be about 100 μ m,, length is about the flax fiber of 100mm and nano-aluminium oxide mixes, put into the ultrasonic bonding of ultrasonic wave device for dissociation 180min, after taking-up, in the baking oven of 70 DEG C, be dried 40min, make nano-aluminium oxide flax fiber matrix material;
(3) take raw material by following weight percent: dry thin natural earth material: 70%; Strength grade is 42.5 ordinary Portland cement: 25%; Nano-aluminium oxide flax fiber matrix material: 5%;
(4) nano silica fume silk fibre composites is added in dry thin natural earth material, stir, add subsequently water, stir, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(5) take out the compound in container in step (4), add cement and water, stir, obtain high-performance cement soil, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
Implementation result: high-performance cement soil prepared by the present embodiment, and dry thin natural earth material: compared with the conventional cement-earth of cement=70:25, after 7 days, its toughness has improved 42%, and ultimate compression strength has improved 12%, and tensile strength has improved 25%; After 28 days, its toughness has improved 56%, and ultimate compression strength has improved 15%, and tensile strength has improved 31%.
With the linen fiber cement soil phase ratio that the weight ratio of dry thin natural earth material, cement, flax fiber is 70:25:5, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 6%, and ultimate compression strength has improved 1%, and tensile strength has improved 5%; After 28 days, its toughness has improved 8%, and ultimate compression strength has improved 4%, and tensile strength has improved 9%.
And compared with the nano-aluminium oxide cement-earth that is 70:25:5 with the weight ratio of dry thin natural earth material, cement, nano-aluminium oxide, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 19%, and ultimate compression strength has improved 4%, and tensile strength has improved 11%; After 28 days, its toughness has improved 27%, and ultimate compression strength has improved 7%, and tensile strength has heightened 13%.
Embodiment 4
The concrete preparation process of high-performance cement soil is as follows:
(1) the natural earth material that is 4～10 by the pH value on Tsing-Hua University meadow is put into rotary dryer, at 80 DEG C, processes 20min, dries and obtains dry ground material, and the square hole sieve that is 5mm by aperture after dry ground material is pulverized on pulverizer obtains dry thin natural earth material;
(2) according to weight ratio 1:7, diameter being about to collagen fabric and the nanometer water glass that 0.01 μ m, length be about 0.1mm mixes, put into the ultrasonic bonding of ultrasonic wave device for dissociation 240min, after taking-up, in the baking oven of 90 DEG C, be dried 10min, obtain nanometer water glass collagen fabric matrix material;
(3) take raw material by following weight percent: dry thin natural earth material: 75%; Strength grade is 42.5 ordinary Portland cement: 22%; Nanometer water glass collagen fabric matrix material: 3%;
(4) nano silica fume silk fibre composites is added in dry thin natural earth material, stir, add subsequently water, stir, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(5) take out the compound in container in step (4), add cement and water, stir, obtain high-performance cement soil, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
Implementation result: high-performance cement soil prepared by the present embodiment, and dry thin natural earth material: compared with the conventional cement-earth of cement=75:22, after 7 days, its toughness has improved 39%, and ultimate compression strength has improved 12%, and tensile strength has improved 18%; After 28 days, its toughness has improved 48%, and ultimate compression strength has improved 14%, and tensile strength has improved 27%.
And with dry thin natural earth material: compared with the silk fiber cement-earth of cement: collagen fabric=7:2:1, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 5%, and ultimate compression strength has improved 2%, and tensile strength has improved 2%; After 28 days, its toughness has improved 9%, and ultimate compression strength has improved 3%, and tensile strength has improved 7%.
And with dry thin natural earth material: cement: the nanometer water glass cement soil phase ratio of nanometer water glass=70:25:5, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 17%, ultimate compression strength has improved 5%, tensile strength has improved 12%; After 28 days, its toughness has improved 23%, and ultimate compression strength has improved 6%, and tensile strength has heightened 14%.
Embodiment 5
The concrete preparation process of high-performance cement soil is as follows:
(1) the natural earth material that is 4～10 by the pH value on Tsing-Hua University meadow is put into rotary dryer and is processed 5min at 110 DEG C, dries and obtains dry ground material, and the square hole sieve that is 5mm by aperture after dry ground material is pulverized on pulverizer obtains dry thin natural earth material;
(2) according to weight ratio 1:10, diameter being about to chitin fiber and the nano calcium hydroxide that 40 μ m, length are about 40mm mixes, put into the ultrasonic bonding of ultrasonic wave device for dissociation 300min, after taking-up, in the baking oven of 100 DEG C, be dried 10min, make nano calcium hydroxide chitin fiber matrix material;
(3) take raw material by following weight percent: dry thin natural earth material: 90%; Strength grade is 42.5 ordinary Portland cement: 9%; Nano calcium hydroxide chitin fiber matrix material: 1%;
(4) nano silica fume silk fibre composites is added in dry thin natural earth material, stir, add subsequently water, stir, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(5) take out the compound in container in step (4), add cement and water, stir, obtain high-performance cement soil, the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
Implementation result: high-performance cement soil prepared by the present embodiment, compared with the conventional cement-earth that is 10:1 with the weight ratio of dry thin natural earth material, cement, after 7 days, its toughness has improved 12%, and ultimate compression strength has improved 4%, and tensile strength has improved 5%; After 28 days, its toughness has improved 27%, and ultimate compression strength has improved 7%, and tensile strength has improved 7%.
Compared with the chitin fiber cement-earth that is 90:9:1 with the weight ratio of dry thin natural earth material, cement, chitin fiber, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 4%, and ultimate compression strength has improved 2%, and tensile strength has improved 2%; After 28 days, its toughness has improved 7%, and ultimate compression strength has improved 3%, and tensile strength has improved 5%.
And compared with the nano calcium hydroxide cement-earth that is 90:9:1 with the weight ratio of dry thin natural earth material, cement, nano calcium hydroxide, after 7 days, the toughness of high-performance cement soil prepared by the present embodiment has improved 7%, and ultimate compression strength has improved 2%, and tensile strength has improved 4%; After 28 days, its toughness has improved 13%, and ultimate compression strength has improved 3%, and tensile strength has heightened 5%.
After the preferred embodiment describing in detail, the personage who is familiar with this technology can clearly understand, can carry out various variations and amendment not departing under above-mentioned claim and spirit, any simple modification, equivalent variations and modification that all foundations technical spirit of the present invention is done above embodiment, all belong to the scope of technical solution of the present invention.
Claims (8)
1. a preparation method for high-performance cement soil, is characterized in that, concrete preparation method comprises the steps:
(1) natural fiber is mixed by the weight ratio of 1:1～10 with nano material, supersound process makes natural fiber and nano material bonding, dry, obtains nano material natural-fiber composite material;
(2) take raw material by following weight percent: dry thin natural earth material: 70%～90%; Cement: 5%～25%; Nano material natural-fiber composite material: 1%～10%;
(3) nano material natural-fiber composite material is added in dry thin natural earth material, stir, add water and stir subsequently, the quality of the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight, puts into the standing 1d of container that water infiltration is crossed;
(4) take out the compound in container, add cement and water to stir, obtain high-performance cement soil, the quality of the water wherein adding accounts for 10% of dry thin natural earth material and cement gross weight.
2. the preparation method of high-performance cement soil according to claim 1, it is characterized in that, described in step (1), nano material is inorganic nano material, is selected from the one in nano silica fume, nano-aluminium oxide, nano calcium hydroxide, nanometer gypsum or nanometer water glass.
3. the preparation method of high-performance cement soil according to claim 1, is characterized in that, the natural fiber described in step (1) is vegetable fibre or animal fibre, and the diameter of natural fiber is 0.01 μ m～100 μ m, and length is 0.1mm～100mm.
4. the preparation method of high-performance cement soil according to claim 3, is characterized in that, described vegetable fibre is seed hair, phloem fiber, leaf fiber or fruit fibre; Animal fibre is chitin fiber in wire protein fiber, the shrimp crab of keratin fiber, silk and the spider silk of animal hair or the collagen fabric of fish scale class.
5. preparation method according to claim 1, is characterized in that, the ultrasonic time described in step (1) is 10min～300min, and the frequency of ultrasonic adopted ultrasonic unit is 10KHz～10MHz, and power is 10W～2KW.
6. preparation method according to claim 1, is characterized in that, the described dry time of step (1) is 10min～60min, and temperature is 30 DEG C～100 DEG C.
7. preparation method according to claim 1, it is characterized in that, described in step (2), dry thin natural earth material is to be prepared from by the following method: the natural earth material that is 4～10 by pH value uses rotary dryer to process 5min～60min at 40 DEG C～110 DEG C, and the power of this dryer is that 3KW～75KW, rotating speed are 1r/min～10r/min; Then use square hole sieve or round hole sieve processing that diameter is 0.075mm～30mm, obtain dry thin natural earth material.
8. the high-performance cement soil that prepared by the preparation method described in claim 1～7 any one.
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| CN106065593A (en) * | 2016-08-04 | 2016-11-02 | 上海理工大学 | A kind of animal fiber and nano silicon reinforced earth and preparation method thereof |
| CN106436679A (en) * | 2016-10-09 | 2017-02-22 | 上海理工大学 | Reinforced soil containing basalt fiber and nano-silica and preparation method of reinforced soil |
| CN107365128A (en) * | 2017-07-24 | 2017-11-21 | 浙江大学宁波理工学院 | Useless silk reinforcing fiber cement plate and preparation method thereof |
| CN108058269A (en) * | 2016-11-07 | 2018-05-22 | 济南轨道交通集团有限公司 | Suitable for different fluidities and the soil cement preparation system of the soil body |
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| CN104234026A (en) * | 2014-08-18 | 2014-12-24 | 河海大学 | Straw fiber yarn reinforced cement modified loose filling soil foundation and construction method thereof |
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| CN106065593A (en) * | 2016-08-04 | 2016-11-02 | 上海理工大学 | A kind of animal fiber and nano silicon reinforced earth and preparation method thereof |
| CN106436679A (en) * | 2016-10-09 | 2017-02-22 | 上海理工大学 | Reinforced soil containing basalt fiber and nano-silica and preparation method of reinforced soil |
| CN108058269A (en) * | 2016-11-07 | 2018-05-22 | 济南轨道交通集团有限公司 | Suitable for different fluidities and the soil cement preparation system of the soil body |
| CN107365128A (en) * | 2017-07-24 | 2017-11-21 | 浙江大学宁波理工学院 | Useless silk reinforcing fiber cement plate and preparation method thereof |
| CN107365128B (en) * | 2017-07-24 | 2020-01-31 | 浙江大学宁波理工学院 | Waste silk reinforced fiber cement board and preparation method thereof |
| CN108484059A (en) * | 2018-06-20 | 2018-09-04 | 贵州遵义亚诚建材有限公司 | A kind of high intensity mixed mud and its preparation process |
| CN112851247A (en) * | 2021-01-28 | 2021-05-28 | 湖北工业大学 | Seawater corrosion resistant nano cement soil and preparation method thereof |
| CN115093180A (en) * | 2022-07-01 | 2022-09-23 | 中德新亚建筑材料有限公司 | Anti-freezing type non-shrinkage grouting material and preparation method thereof |
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