JP7382492B2 - 路盤層の構築方法とそれに用いる混合物 - Google Patents
路盤層の構築方法とそれに用いる混合物 Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims description 51
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- 239000002557 mineral fiber Substances 0.000 description 1
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- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
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- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/36—Bituminous materials, e.g. tar, pitch
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/46—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing and placing the materials, e.g. slurry seals
- E01C19/463—Bituminous mixtures of which at least part of the solid ingredients has previously been deposited on the surface, e.g. with lifting of spread or windrowed aggregate
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00103—Self-compacting mixtures
-
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
- Road Repair (AREA)
Description
w=(Ww/Ws)×100[%] 式1
下記の材料を用いて、下記表1に示す配合で、含水比が3.0質量%、5.0質量%、7.0質量%、9.0質量%、又は11.0質量%とそれぞれ異なる試料1、2、3、4、5を調製した。調製した試料1~5を、それぞれ2系統に分け、型枠に充填し、一方の系統については、マーシャルランマで両面50回突きして、転圧による締固めあり(以下、「転圧あり」)の混合物とした。他方の系統については、型枠への充填後、マーシャルランマによる突きはせず、必要に応じて突き棒で軽く突くことによって空隙除去するにとどめ、転圧による締固めなし(以下、「転圧なし」)の混合物とした。
・骨材:粒度調整砕石(最大粒径40mm)(乾燥済み)
・アスファルト乳剤:MN-1(ノニオン系 混合用アスファルト乳剤)(固形分濃度57質量%)
・セメント:普通ポルトランドセメント
なお、上記骨材(粒度調整砕石)の最適含水比を締固め試験によって測定したところ、5.0質量%であった。また、骨材は乾燥させた後に実験に用いたので、下記表に示す骨材の質量は全て乾燥質量である。
実験1において、含水比が最適含水比を上回る場合には、「転圧なし」であっても、「転圧あり」の場合と劣らぬ乾燥密度並びに一軸圧縮強度が得られ、かつ、適度な硬さと割れにくさの指標となる一次変位量及び残留強度率の双方において良好な結果が得られたので、含水比を最適含水比を上回る9.0質量%(最適含水比の1.8倍)に固定して、混合するアスファルト乳剤とセメントの量を変化させて、「転圧なし」の条件下で硬化させた混合物の物性にどのような影響が及ぶかを試験した。
骨材とアスファルト乳剤とセメントを含む混合物に、一般にコンクリートに使用されている減水剤を添加したとき、混合物の硬化体の物性及び好適な含水比がどのような影響を受けるかを調べる実験を行った。
・骨材:粒度調整砕石(最大粒径40mm)(乾燥済み)
・アスファルト乳剤:MN-1(ノニオン系 混合用アスファルト乳剤)(固形分濃度65質量%)
・セメント:普通ポルトランドセメント
なお、上記骨材(粒度調整砕石)の最適含水比を締固め試験によって測定したところ、5.0質量%であった。また、骨材は乾燥させた後に実験に用いた。
fc=(fb/0.42)1.5[N/mm2] 式2
fc:一軸圧縮強度[N/mm2]
fb:曲げ強度[N/mm2]
実験3で用いたのと同じ材料と、さらに繊維材料を用いて、下記表6に記載の配合組成の混合物の試料20を調製し、実験3におけると同様にして、その曲げ強度を測定した。なお、繊維材料としては、バルサルト繊維(繊維径:15μm、繊維長:24mm)を用いた。なお、試料20の配合組成において、混合物全量に対する1質量%という繊維材料の配合量は、対骨材乾燥質量に換算すると、約1.3質量%に相当する。
Claims (11)
- 骨材とアスファルト乳剤とセメントを混合して、含水比が前記骨材の最適含水比を上回る高含水状態にある混合物とする工程、及び、前記混合物を敷きならす工程を含み、転圧による締固め工程を含まない、路盤層の無転圧構築方法。
- 前記混合物とする工程において、前記アスファルト乳剤と前記セメントとが、前記アスファルト乳剤中の蒸発残留物の質量と前記セメントの質量の合計量が、前記混合物に含まれる乾燥固形分の合計質量の10質量%以上となる割合で、前記骨材と混合される請求項1記載の路盤層の無転圧構築方法。
- 前記混合物とする工程において、前記アスファルト乳剤と前記セメントとが、前記アスファルト乳剤中の蒸発残留物の質量の前記セメントの質量に対する比が0.7以上1.2以下の割合で、前記骨材と混合される請求項1又は2記載の路盤層の無転圧構築方法。
- 前記混合物とする工程が、さらに繊維材料を混合する工程を含む、請求項1~3のいずれかに記載の路盤層の無転圧構築方法。
- 前記混合物とする工程が、プラント混合方式によって行われる請求項1~4のいずれかに記載の路盤層の無転圧構築方法。
- 既設舗装を少なくとも路盤層の一部を含む深さまで掘削、破砕し、破砕物を前記骨材の一部又は全部とする工程を含み、前記混合物とする工程が、前記骨材の一部又は全部とする工程とともに、路盤層を構築する現位置において行われる請求項1~4のいずれかに記載の路盤層の無転圧構築方法。
- 骨材とアスファルト乳剤とセメントを含み、含水比が前記骨材の最適含水比を上回る高含水状態にある、路盤層用の混合物。
- 前記アスファルト乳剤と前記セメントとが、前記アスファルト乳剤中の蒸発残留物の質量と前記セメントの質量の合計が、前記混合物に含まれる乾燥固形分の合計質量の10質量%以上となる割合で含まれている請求項7記載の路盤層用の混合物。
- 前記アスファルト乳剤と前記セメントとが、前記アスファルト乳剤中の蒸発残留物の質量の前記セメントの質量に対する比が0.7以上1.2以下の割合で含まれている請求項7又は8記載の路盤層用の混合物。
- さらに繊維材料を含む請求項7~9のいずれかに記載の路盤層用の混合物。
- 前記骨材の一部又は全部が既設路盤層の破砕物である、請求項7~10のいずれかに記載の路盤層用の混合物。
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