CN102153326A - Curing agent for soft soil and application thereof - Google Patents
Curing agent for soft soil and application thereof Download PDFInfo
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- CN102153326A CN102153326A CN 201010578511 CN201010578511A CN102153326A CN 102153326 A CN102153326 A CN 102153326A CN 201010578511 CN201010578511 CN 201010578511 CN 201010578511 A CN201010578511 A CN 201010578511A CN 102153326 A CN102153326 A CN 102153326A
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Abstract
The invention relates to a curing agent for reinforcing and treating a soft soil foundation and application thereof. The curing agent for soft soil contains 10-25% of cement clinker, 65-80% of slag, 4-10% of filling material, 1-10% of expanding agent, 0.2-5% of alkaline excitation agent and 0.02-0.3% of surfactant, wherein the filling material is fine sand or/and coal ash; the expanding agent is gypsum or desulfurization gypsum; the expanding agent is calcined lime or sodium hydroxide; and the surfactant is triethanolamine or calcium lignosulphonate. The curing agent for soft soil can be applied to reinforcing soft soil like cumulosol, high-salinity stratum or the like, and the using amount of the curing agent for soft soil is preferably 8-20% of the weight of a reinforced soil body. The curing agent for soft soil, provided by the invention, only contains a little cement clinker and can enable soil layers with poor cement reinforcing effects, such as cumulosol, high-salinity stratum or the like, to obtain better physical and mechanical performances after the curing agent for soft soil is applied.
Description
Technical field
The present invention relates to a kind of hydraulic cementing materials and application thereof, be specifically related to a kind of solidifying agent and application thereof that is used for reinforced soft soil ground and processing, belong to material of construction and building lot field,
Background technology
The weak soil curing technology as paddling process, churning method etc., is one of foundation consolidating technology that is most widely used.The solidifying agent that uses mainly is a cement at present, and cement stabilization soft clay intensity is lower, and not environmental protection is uneconomical.Poor on specific stratum such as consolidation effects such as cumulosol, high saliferous strata, caused many engineering accidents.
Summary of the invention
One of purpose of the present invention provides a kind of Soft Ground solidifying agent, and this soft soil curing agent only contains a spot of cement clinker, can make the soil layer after the reinforcing have the better physical mechanical property.
In order to realize purpose of the present invention, the contriver has finally obtained following technical scheme by great deal of experimental:
A kind of soft soil curing agent (being called for short the QC solidifying agent) comprises following components in weight percentage:
Cement clinker 10%-25%
Slag 65%-80%
Compaction material 4%-10%
Swelling agent 1%-10%
Wherein, described compaction material is a fine sand or/and flyash, and described swelling agent is plaster stone or desulfurated plaster.
Preferably, above-mentioned soft soil curing agent comprises following components in weight percentage:
Cement clinker 10%-25%
Slag 65%-80%
Compaction material 4%-10%
Plaster stone 2%-5%.
Preferably, above-mentioned soft soil curing agent comprises following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Compaction material 4%-10%
Swelling agent 1%-10%
Alkali-activator 0.2%-5%
Tensio-active agent 0.02-0.3%
Wherein, described alkali-activator is unslaked lime or sodium hydroxide; Described tensio-active agent is trolamine or calcium lignin sulphonate.
Further preferably, above-mentioned soft soil curing agent comprises following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Fine sand 4%-8%
Desulfurated plaster 1%-10%
Alkali-activator 0.2%-5%
Tensio-active agent 0.02-0.3%.
In an embodiment of the present invention, above-mentioned soft soil curing agent comprises following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Fine sand 4%-8%
Desulfurated plaster 1%-10%
Sodium hydroxide 0.2%-1.0%
Trolamine 0.02-0.05%.
Remove the component and the proportioning of disclosed soft soil curing agent in the specific embodiment, can realize purpose of the present invention equally by the soft soil curing agent that following components in weight percentage is formed, therefore also in protection scope of the present invention:
Cement clinker 15%-20%
Slag 70%-75%
Fine sand 4%-8%
Desulfurated plaster 1%-10%
Unslaked lime 1%-5%
Calcium lignin sulphonate 0.05-0.3%.
Second purpose of the present invention is to disclose the application of above-mentioned any soft soil curing agent in the soil layer of reinforcing cement stabilization weak effects such as cumulosol or high saliferous strata.
Preferably, above-mentioned any soft soil curing agent is when reinforcing cumulosol or high saliferous strata, and the consumption of described soft soil curing agent is 8%～20% of a soil mass consolidation weight.
Further preferably, above-mentioned any soft soil curing agent is when reinforcing cumulosol or high saliferous strata, and the consumption of described soft soil curing agent is 18% of a soil mass consolidation weight.
The main scope of application of QC solidifying agent of the present invention is the ground process field, i.e. cement mixing method, high-pressure rotary-spray, and karst slip casting etc. have solved the uppity problem of pile quality in the Soft Ground.Because the starting material of solidifying agent of the present invention mainly adopt industrial waste, its achievement can reduce construction costs again when improving construction quality, when having environmental protection effect, brought huge economic benefit and social benefit.
Compared with prior art, soft soil curing agent of the present invention has following useful effect:
(1) cost is low, and the feature of environmental protection is good.In Soft Ground, the cement clinker volume in the QC solidifying agent only is 10～25%, and other materials is through being processed into specific surface area 350m for adopting industrial waste after treatment such as blast-furnace slag in the solidifying agent
2The slag powders of/Kg, desulfurated plaster are the wastes behind the power plant desulfurization, or the like, have very significant environment protection effect.
(2) quality is good.The more conventional plain cement Ground Treatment of the effect of solidifying agent of the present invention in soft clay ground will be got well, and water stability is good, durable, the early strength height, and later strength is unaffected.By the cement-earth test specimen that proportioning of the present invention is made under the situation of volume (8%～20%) unanimity, its unconfined compression strength has all reached the ideal effect.Specifically as can be seen by embodiment 1-10, during shop experiment, soft soil curing agent of the present invention was volume 15%, 18% o'clock, with muddy soft soil water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength can reach 2.11-3.74Mpa, and intensity can reach 2.57-5.05Mpa in 28 days; During test in place, the no lateral confinement resistance to compression detected result that the sampling of loosing core after 7 days and 28 days behind the soft soil curing agent stirring pile of the present invention detects can reach 1.25-1.87Mpa and 3.24-3.91Mpa respectively.
Embodiment
Below be specific embodiments of the invention, technical scheme of the present invention is done further the description, but protection scope of the present invention is not limited to these embodiment.Every do not deviate from the change of the present invention design or be equal to substitute include within protection scope of the present invention.
The comparative example 1:
Cement clinker 50%
Desulfurated plaster 10%
Granulated blast-furnace slag 40%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.87Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 3.78Mpa.
The comparative example 2:
Cement clinker 50%
Desulfurated plaster 20%
Granulated blast-furnace slag 30%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.99Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.68Mpa.
The comparative example 3:
Cement clinker 50%
Desulfurated plaster 30%
Granulated blast-furnace slag 20%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.52Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.41Mpa.
The comparative example 4:
Cement clinker 60%
Desulfurated plaster 10%
Granulated blast-furnace slag 30%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.91Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 3.12Mpa.
The comparative example 5:
Cement clinker 60%
Desulfurated plaster 20%
Granulated blast-furnace slag 20%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.27Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.84Mpa.
The comparative example 6:
Cement clinker 70%
Desulfurated plaster 10%
Granulated blast-furnace slag 20%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.38Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.78Mpa.
The comparative example 7:
Cement clinker 70%
Desulfurated plaster 20%
Granulated blast-furnace slag 10%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 0.93Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 1.69Mpa.
The comparative example 8:
Cement clinker 70%
Desulfurated plaster 30%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 0.44Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 0.80Mpa.
The comparative example 9:
Cement clinker 70%
Granulated blast-furnace slag 30%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.87Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 3.86Mpa.
The comparative example 10:
Cement clinker 80%
Desulfurated plaster 20%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 1.36Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 3.11Mpa.
The comparative example 11:
Cement clinker 90%
Desulfurated plaster 10%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 0.92Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.00Mpa.
The comparative example 12:
Cement clinker 100%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 0.86Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.14Mpa.
Embodiment 1: the preparation of soft soil curing agent
Cement clinker 20%
Desulfurated plaster 5%
Granulated blast-furnace slag 70%
Powder fine sand 5%
Sodium hydroxide 0%
Trolamine 0%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 2.11Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.57Mpa.
Embodiment 2: the preparation of soft soil curing agent
Cement clinker 20%
Desulfurated plaster 1%
Granulated blast-furnace slag 70%
Powder fine sand 8%
Sodium hydroxide 0.95%
Trolamine 0.05%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 2.31Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 3.46Mpa.
Embodiment 3: the preparation of soft soil curing agent
Cement clinker 15%
Desulfurated plaster 5%
Granulated blast-furnace slag 75%
Powder fine sand 4%
Sodium hydroxide 0.95%
Trolamine 0.05%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 2.51Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 3.37Mpa.
Embodiment 4: the preparation of soft soil curing agent
Cement clinker 15%
Desulfurated plaster 1%
Granulated blast-furnace slag 75%
Powder fine sand 8%
Sodium hydroxide 0.95%
Trolamine 0.05%
At volume 15%, with muddy soft soil volume 85% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 2.45Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 4.47Mpa.
Embodiment 5: the preparation of soft soil curing agent
Cement clinker 20%
Desulfurated plaster 5%
Granulated blast-furnace slag 70%
Powder fine sand 5%
Sodium hydroxide 0%
Trolamine 0%
At volume 18%, with muddy soft soil volume 82% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 2.86Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 2.75Mpa.
Embodiment 6: the preparation of soft soil curing agent
Cement clinker 20%
Desulfurated plaster 1%
Granulated blast-furnace slag 70%
Powder fine sand 8%
Sodium hydroxide 0.95%
Trolamine 0.05%
At volume 18%, with muddy soft soil volume 82% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 2.96Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 4.15Mpa.
Embodiment 7: the preparation of soft soil curing agent
Cement clinker 15%
Desulfurated plaster 5%
Granulated blast-furnace slag 75%
Powder fine sand 4%
Sodium hydroxide 0.95%
Trolamine 0.05%
At volume 18%, with muddy soft soil volume 82% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 3.16Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 5.05Mpa.
Embodiment 8: the preparation of soft soil curing agent
Cement clinker 15%
Desulfurated plaster 1%
Granulated blast-furnace slag 75%
Powder fine sand 8%
Sodium hydroxide 0.95%
Trolamine 0.05%
At volume 18%, with muddy soft soil volume 82% (weight ratio) water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength was 3.74Mpa by the solidifying agent of above-mentioned proportioning preparation, and 28 days intensity is 5.05Mpa.
Embodiment 9: soft soil curing agent is at mixing pile building-site application test
QC solidifying agent of the present invention is geographic Ning'an railway Yi Jiang station mixing pile building-site application test in Wuhu; be at stratum, cement matrix, volume under 15% the situation; adopt cement clinker 15%; granulated blast-furnace slag 75%; desulfurated plaster 1%; powder fine sand 8%, sodium hydroxide 0.95%, trolamine 0.05%.The no lateral confinement resistance to compression detected result that the sampling of loosing core after 7 days and 28 days behind the stirring pile detects is respectively: 1.87Mpa and 3.91Mpa.
Embodiment 10: soft soil curing agent is at mixing pile building-site application test
QC solidifying agent of the present invention is at ring station, hinge railway Kunyang, geographic Kunming, Dian Chi, Kunming mixing pile building-site application test; be at stratum, cement matrix, volume under 15% the situation; adopt cement clinker 15%; granulated blast-furnace slag 70%; desulfurated plaster 10%; powder fine sand 4%, sodium hydroxide 0.95%, trolamine 0.05%.The no lateral confinement resistance to compression detected result that the sampling of loosing core after 7 days and 28 days behind the stirring pile detects is respectively: 1.25Mpa and 3.24Mpa.
By comparative example 1-12 and preparation embodiment 1-10 of the present invention as can be seen, when the component of soft soil curing agent only contains cement clinker, desulfurated plaster and slag, with muddy soft soil water cement ratio 0.55: 1, through mixing latter made test specimen, the average unconfined compression strength of 7 days or 28 days is all lower, and the soft soil curing agent of comparative example 1-12 preparation, and the content of its cement clinker is greater than 50%, the cost height is unfavorable for suitability for industrialized production.And during the soft soil curing agent shop experiment of embodiment of the invention 1-10 preparation, the more conventional plain cement Ground Treatment of the effect in soft clay ground will be got well, and water stability is good, and is durable, the early strength height, and later strength is unaffected.By the cement-earth test specimen that proportioning of the present invention is made under the situation of volume (8%～20%) unanimity, its unconfined compression strength has all reached the ideal effect.Be specially, with muddy soft soil water cement ratio 0.55: 1, through mixing latter made test specimen, 7 days average unconfined compression strength can reach 2.11-3.74Mpa, and intensity can reach 2.57-5.05Mpa in 28 days; During test in place, the no lateral confinement resistance to compression detected result that the sampling of loosing core after 7 days and 28 days behind the soft soil curing agent stirring pile of the present invention detects can reach 1.25-1.87Mpa and 3.24-3.91Mpa respectively.In addition, the soft soil curing agent cost of embodiment of the invention 1-10 preparation is low, and the feature of environmental protection is good.In Soft Ground, the cement clinker volume in the QC solidifying agent only is 10～25%, and other materials is through being processed into specific surface area 350m for adopting industrial waste after treatment such as blast-furnace slag in the solidifying agent
2The slag powders of/Kg, desulfurated plaster are the wastes behind the power plant desulfurization, or the like, have very significant environment protection effect.
Claims (9)
1. soft soil curing agent is characterized in that: comprise following components in weight percentage:
Cement clinker 10%-25%
Slag 65%-80%
Compaction material 4%-10%
Swelling agent 1%-10%
Wherein, described compaction material is a fine sand or/and flyash, and described swelling agent is plaster stone or desulfurated plaster.
2. soft soil curing agent as claimed in claim 1 is characterized in that: comprise following components in weight percentage:
Cement clinker 10%-25%
Slag 65%-80%
Compaction material 4%-10%
Plaster stone 2%-5%.
3. soft soil curing agent as claimed in claim 1 is characterized in that: comprise following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Compaction material 4%-10%
Swelling agent 1%-10%
Alkali-activator 0.2%-5%
Tensio-active agent 0.02-0.3%
Wherein, described alkali-activator is unslaked lime or sodium hydroxide; Described tensio-active agent is trolamine or calcium lignin sulphonate.
4. soft soil curing agent as claimed in claim 3 is characterized in that: comprise following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Fine sand 4%-8%
Desulfurated plaster 1%-10%
Alkali-activator 0.2%-5%
Tensio-active agent 0.02-0.3%.
5. soft soil curing agent as claimed in claim 4 is characterized in that: comprise following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Fine sand 4%-8%
Desulfurated plaster 1%-10%
Sodium hydroxide 0.2%-1.0%
Trolamine 0.02-0.05%.
6. soft soil curing agent as claimed in claim 4 is characterized in that: comprise following components in weight percentage:
Cement clinker 15%-20%
Slag 70%-75%
Fine sand 4%-8%
Desulfurated plaster 1%-10%
Unslaked lime 1%-5%
Calcium lignin sulphonate 0.05-0.3%.
7. the application of the arbitrary described soft soil curing agent of claim 1-6 in reinforcing cumulosol or high saliferous strata.
8. application as claimed in claim 7 is characterized in that: the consumption of described soft soil curing agent is 8%～20% of a soil mass consolidation weight.
9. application as claimed in claim 7 is characterized in that: the consumption of described soft soil curing agent is 18% of a soil mass consolidation weight.
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