JP2016179927A - Concrete pavement - Google Patents
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- JP2016179927A JP2016179927A JP2015061476A JP2015061476A JP2016179927A JP 2016179927 A JP2016179927 A JP 2016179927A JP 2015061476 A JP2015061476 A JP 2015061476A JP 2015061476 A JP2015061476 A JP 2015061476A JP 2016179927 A JP2016179927 A JP 2016179927A
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- 239000004567 concrete Substances 0.000 title claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 239000008187 granular material Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 6
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000008262 pumice Substances 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims 1
- 235000019362 perlite Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 11
- 229910001562 pearlite Inorganic materials 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- -1 alkali metal salts Chemical class 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 4
- 239000010432 diamond Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000002372 labelling Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、すべり抵抗性が高いコンクリート舗装に関する。 The present invention relates to a concrete pavement having high slip resistance.
コンクリート舗装は供用に伴い、すべり抵抗性が低下するため、すべり抵抗性を維持する方法が求められている。
一般に、コンクリート舗装の滑り抵抗性を高める工法として、
(i)舗装面に複数の溝を切り、その溝に水を流して舗装面のすべり抵抗を増大させるグルービング工法、
(ii)舗装の表面仕上げ後に凝結遅延剤を散布して表面の硬化を遅らせ、ブラシ等により表面を削り取って、粗骨材の頂部を露出させる骨材露出工法、
(iii)舗装面に樹脂系接着材を塗布した後、硬質骨材を散布して接着させるニート工法等が知られている。
そして、例えば、前記ニート工法として、特許文献1には、道路の舗装面に、ウレタン系樹脂層が設けられ、前記ウレタン系樹脂層に、一部が埋設された凍結抑制機能を発揮し得るゴム材と共に、すべり抵抗性を発揮し得る骨材が設けられている道路の表面処理構造が提案されている。
しかし、前記(i)と(ii)の工法は舗装の施工時に用いるものであり、施工後に、舗装のすべり抵抗性を回復させることはできない。また、(iii)の工法は、樹脂系接着剤を用いるため、コスト高になる。
As concrete pavement decreases in slip resistance with service, a method for maintaining slip resistance is required.
In general, as a method of increasing the slip resistance of concrete pavement,
(i) A grooving method that cuts a plurality of grooves on the pavement surface and flows water into the grooves to increase the sliding resistance of the pavement surface,
(ii) Aggregate exposure method that sprays a set retarder after finishing the surface of the pavement to delay the hardening of the surface, scrapes the surface with a brush, etc., and exposes the top of the coarse aggregate,
(iii) A neat method is known in which a resin-based adhesive is applied to a paved surface, and then hard aggregates are dispersed and bonded.
And, for example, as the neat construction method, in Patent Document 1, a rubber that can exhibit a freeze-inhibiting function in which a urethane-based resin layer is provided on a pavement surface of a road and a part of the urethane-based resin layer is embedded in the urethane-based resin layer A road surface treatment structure has been proposed in which an aggregate capable of exhibiting slip resistance is provided together with the material.
However, the methods (i) and (ii) are used at the time of pavement construction, and the slip resistance of the pavement cannot be recovered after construction. In addition, the method (iii) uses a resin adhesive, which increases the cost.
また、コンクリート舗装の滑り抵抗性を高める粗面処理工法として、
(i)ショットブラスト装置から供給された鋼球を舗装面に投射して粗面処理を行うショットブラスト工法、
(ii)数ｍｍの隙間を設けて連続的に取り付けたダイヤモンドブレードを用いて、舗装面を薄層で研削するダイヤモンドグラインディング工法等が知られている。
しかし、いずれの工法も、硬化した舗装面を機械的に粗面処理するため、騒音や粉塵が発生するほか、広範囲の舗装面に適用する場合は手間がかかるという問題がある。
In addition, as a rough surface treatment method to increase the slip resistance of concrete pavement,
(i) A shot blasting method in which a steel ball supplied from a shot blasting device is projected onto a pavement surface to perform a rough surface treatment,
(ii) A diamond grinding method is known in which a paved surface is ground with a thin layer using a diamond blade continuously attached with a gap of several mm.
However, both methods have a problem that since the hardened pavement surface is mechanically roughened, noise and dust are generated and it takes time and effort when applied to a wide range of pavement surfaces.
したがって、本発明は、高いすべり抵抗性を長期に亘って維持できるコンクリート舗装を提供することを目的とする。 Therefore, an object of this invention is to provide the concrete pavement which can maintain high slip resistance over a long period of time.
そこで、本発明者らは、前記目的を達成するために、特定の無機質多孔体をコンクリート舗装に、特殊な条件で用いることを見出し、本発明を完成した。すなわち、本発明は、以下の［１］〜［２］を提供するものである。
［１］セメント、水、細骨材、粗骨材、減水剤及び粒径１ｍｍ以下の無機質多孔質粉粒体を含むコンクリート舗装であって、
細骨材と無機質多孔質粉粒体の合計体積中の無機質多孔質粉粒体の体積が２０〜７０体積％であることを特徴とするコンクリート舗装、を提供する。
［２］無機質多孔質粉粒体が、オートクレーブ養生した気泡コンクリート、パーライト、ロックウール、軽石、から選ばれる１種以上の粉粒体である［１］記載のコンクリート舗装、を提供する。
In order to achieve the above object, the present inventors have found that a specific inorganic porous material is used for concrete pavement under special conditions, and have completed the present invention. That is, the present invention provides the following [1] to [2].
[1] A concrete pavement comprising cement, water, fine aggregate, coarse aggregate, a water reducing agent, and an inorganic porous granular material having a particle size of 1 mm or less,
A concrete pavement characterized in that the volume of the inorganic porous powder in the total volume of the fine aggregate and the inorganic porous powder is 20 to 70% by volume.
[2] The concrete pavement according to [1], wherein the inorganic porous granular material is one or more types of granular material selected from aerated concrete, pearlite, rock wool, and pumice cured by autoclaving.
ここで、無機質多孔質体は、粒径１ｍｍ以下である。多孔体は、孔形成部分の厚みが適当であり、適度な衝撃で孔部が破損する脆弱性が求められる。しかし、舗装コンクリート全体の強度を保持することも求められる。この条件に適合するもので、具体的には、オートクレーブ養生した気泡コンクリート、パーライト、ロックウール、軽石が特に好ましい。粒径が１ｍｍを越えると、車道用の舗装コンクリートに要求される曲げ強度の基準値（４．５Ｎ／ｍｍ２以上）を満たすことが困難となる。
無機質多孔質粉粒体の配合量は、コンクリート舗装中の細骨材と無機質多孔質粉粒体の合計体積中に２０〜７０体積％、好ましくは３０〜６０体積％、より好ましくは３５〜５０体積％である。
Here, the inorganic porous body has a particle size of 1 mm or less. The thickness of the hole forming portion is appropriate for the porous body, and the brittleness that damages the hole portion with an appropriate impact is required. However, it is also required to maintain the strength of the paved concrete as a whole. In particular, foam concrete, pearlite, rock wool, and pumice that are cured by autoclave are particularly preferable because they meet this condition. When the particle diameter exceeds 1 mm, it becomes difficult to satisfy the reference value (4.5 N / mm 2 or more) of the bending strength required for paved concrete for roadways.
The compounding quantity of an inorganic porous granular material is 20-70 volume% in the total volume of the fine aggregate and inorganic porous granular material in concrete pavement, Preferably it is 30-60 volume%, More preferably, it is 35-50. % By volume.
すべり抵抗性が長期に亘って維持できる理由は明瞭でないが、粒径１ｍｍ以下のパーライトなどの無機質多孔質粉粒体(脆弱な材料)が、舗装の表層等に存在することにより、該脆弱な材料の破損や脱落により、表層に微小な損傷が生じ、舗装表面に波長１ｍｍ以下の細かな凹凸が確保され、滑り抵抗性の低下を抑制する。更に、舗装表層部から、長期に亘って、脆弱材料の破損や脱落が、継続可能となるためであると考えられる。 The reason why the slip resistance can be maintained over a long period of time is not clear. Due to the breakage or dropout of the material, minute damage occurs on the surface layer, and fine irregularities with a wavelength of 1 mm or less are secured on the pavement surface, thereby suppressing a decrease in slip resistance. Furthermore, it is considered that the fragile material can continue to be broken or dropped from the pavement surface layer for a long period of time.
細骨材と無機質多孔質粉粒体の合計体積中、無機質多孔質粉粒体の体積が２０体積％未満では、充分な凹凸形成ができず、コンクリート舗装のすべり抵抗性が低下する。一方、無機質多孔質粉粒体の体積が７０体積％を越えると、車道用の舗装コンクリートに要求される曲げ強度の基準値（４．５Ｎ／ｍｍ２以上）を満たすことが困難となる。また、耐摩耗性も低下する。 If the volume of the inorganic porous granular material is less than 20% by volume in the total volume of the fine aggregate and the inorganic porous granular material, sufficient unevenness cannot be formed, and the slip resistance of the concrete pavement decreases. On the other hand, when the volume of the inorganic porous granular material exceeds 70% by volume, it becomes difficult to satisfy the bending strength standard value (4.5 N / mm 2 or more) required for roadway paving concrete. In addition, wear resistance is reduced.
本発明のコンクリート舗装は、高いすべり抵抗性を長期に亘って維持でき、また高い曲げ強度を有する。従って、補修工事を行う必要がないため、補修にともなう交通規制、環境への影響、費用の発生、などを考慮する必要がない。また、ダイヤモンドグラインディングやブラスト処理のような物理的衝撃を与えないため、コンクリートに生じる損傷を防ぐことができる。 The concrete pavement of the present invention can maintain high slip resistance over a long period of time and has high bending strength. Therefore, since it is not necessary to carry out repair work, there is no need to consider traffic regulations, environmental impacts, and costs associated with repairs. In addition, since physical impacts such as diamond grinding and blasting are not applied, damage to concrete can be prevented.
本発明の舗装コンクリートを構成する材料は、少なくとも、無機質多孔質粉粒体、セメント、水、細骨材、粗骨材、および減水剤である。
以下、各材料について説明する。
The material constituting the paving concrete of the present invention is at least an inorganic porous powder, cement, water, fine aggregate, coarse aggregate, and water reducing agent.
Hereinafter, each material will be described.
セメントは、特に制限されず、普通ポルトランドセメント、早強ポルトランドセメント、中庸熱ポルトランドセメント、低熱ポルトランドセメント、高炉セメント、フライアッシュセメント、エコセメント、およびシリカフユームプレミックスセメントからなる群より選ばれる１種以上が挙げられる。
また単位セメント量は、好ましくは２００〜７４０ｋｇ／ｍ３、より好ましくは２７０〜６００ｋｇ／ｍ３である。該値が２００ｋｇ／ｍ３未満では舗装コンクリートの強度が低下し、７４０ｋｇ／ｍ３を超えると舗装コンクリートのすべり抵抗性の低下が認められる。
The cement is not particularly limited, and is selected from the group consisting of ordinary Portland cement, early-strength Portland cement, medium heat Portland cement, low heat Portland cement, blast furnace cement, fly ash cement, eco cement, and silica fume premix cement. More than species.
The unit cement amount is preferably 200 to 740 kg / m 3 , more preferably 270 to 600 kg / m 3 . When the value is less than 200 kg / m 3 , the strength of the paved concrete is lowered, and when it exceeds 740 kg / m 3 , the slip resistance of the paved concrete is reduced.
水は、特に限定されず、水道水、スラッジ水、下水処理水等を用いることができる。コンクリート舗装に用いる水セメント比は、２５〜６５％、好ましくは３０〜６０％である。水セメント比が、２５％以下では、コンクリート面に凹凸が形成され難くなり、６５％を超えると曲げ強度が低下する虞がある。 Water is not particularly limited, and tap water, sludge water, sewage treated water, and the like can be used. The water-cement ratio used for concrete pavement is 25 to 65%, preferably 30 to 60%. When the water cement ratio is 25% or less, it is difficult to form irregularities on the concrete surface, and when it exceeds 65%, the bending strength may decrease.
細骨材は、特に限定されず、川砂、山砂、陸砂、海砂、砕砂、珪砂、およびスラグ細骨材からなる群より選ばれる１種以上が挙げられる。また、コンクリート中の細骨材と無機質多孔質粉粒体の合計体積は、好ましくは０．１〜０．５ｍ３／ｍ３、より好ましくは０．２〜０．４ｍ３／ｍ３である。該値が０．１ｍ３／ｍ３未満ではすべり抵抗性の低下抑制効果が低下し、０．５ｍ３／ｍ３を超えると舗装コンクリートの流動性やコンシステンシーが低下して、作業性が悪くなる場合がある。 The fine aggregate is not particularly limited, and examples thereof include one or more selected from the group consisting of river sand, mountain sand, land sand, sea sand, crushed sand, silica sand, and slag fine aggregate. The total volume of the fine aggregate and inorganic porous particulate material in the concrete is preferably 0.1-0.5 M 3 / m 3, more preferably 0.2-0.4 m 3 / m 3 . It said value decreases sliding resistance reduction effect of suppressing is less than 0.1m 3 / m 3, 0.5m 3 / m 3 decreases more than the fluidity or consistency of the paving concrete and poor workability There is a case.
粗骨材は、特に限定されず、川砂利、砕石、スラグ粗骨材等からなる群より選ばれる１種以上が挙げられる。また、単位粗骨材量は、好ましくは１０００〜１３００ｋｇ／ｍ３、より好ましくは１０５０〜１２００ｋｇ／ｍ３、さらに好ましくは１１００〜１１５０ｋｇ／ｍ３である。該値が１０００ｋｇ／ｍ３未満では舗装コンクリートの耐久性や耐摩耗性が低下し、１３００ｋｇ／ｍ３を超えると舗装コンクリートのワーカビリティが低下する場合がある。
また、粗骨材の最大粒径は好ましくは１０〜５０ｍｍ、より好ましくは１３〜４０ｍｍである。該値が１０ｍｍ未満では舗装コンクリートの耐摩耗性が低下し、５０ｍｍを超えると入手が困難なほか、舗装コンクリートのワーカビリティが低下する場合がある。なお、前記細骨材および前記粗骨材は、天然骨材のほか再生骨材も用いることができる。
The coarse aggregate is not particularly limited, and examples thereof include one or more selected from the group consisting of river gravel, crushed stone, slag coarse aggregate and the like. Further, the unit coarse aggregate amount is preferably 1000 to 1300 kg / m 3 , more preferably 1050 to 1200 kg / m 3 , and further preferably 1100 to 1150 kg / m 3 . When the value is less than 1000 kg / m 3 , the durability and wear resistance of the paving concrete are lowered, and when it exceeds 1300 kg / m 3 , the workability of the paving concrete may be lowered.
The maximum particle size of the coarse aggregate is preferably 10 to 50 mm, more preferably 13 to 40 mm. If the value is less than 10 mm, the wear resistance of the paving concrete is lowered, and if it exceeds 50 mm, it is difficult to obtain and the workability of the paving concrete may be lowered. The fine aggregate and the coarse aggregate may be natural aggregate as well as recycled aggregate.
減水剤は、リグニンスルホン酸、ナフタレンスルホン酸ホルムアルデヒド縮合物、メラミンスルホン酸ホルムアルデヒド縮合物、ポリカルボン酸、およびこれらの塩からなる群より選ばれる１種以上が挙げられる。また、前記の塩は、ナトリウム、カリウム等のアルカリ金属塩や、カルシウム、マグネシウム等のアルカリ土類金属塩からなる群より選ばれる１種以上が挙げられる。また、これらの減水剤は、減水性能や空気連行性能等により、ＡＥ減水剤、高性能減水剤、または高性能ＡＥ減水剤等に分類される。これらの中でも、本発明において用いる減水剤は、作業性（混練性や施工性）の確保や耐久性等の観点から、好ましくはＡＥ減水剤であり、より好ましくはリグニンスルホン酸塩を有効成分とするＡＥ減水剤である。
また、減水剤の添加量は、好ましくはセメントに対して０．１〜５．０質量％、より好ましくは０．３〜３．０質量％、さらに好ましくは０．５〜２．０質量％である。該値が０．１質量％未満では減水性能が低く、５．０質量％を超えるとセメントの凝結が遅延する場合があるほかコスト高になる。
Examples of the water reducing agent include one or more selected from the group consisting of lignin sulfonic acid, naphthalene sulfonic acid formaldehyde condensate, melamine sulfonic acid formaldehyde condensate, polycarboxylic acid, and salts thereof. Examples of the salt include one or more selected from the group consisting of alkali metal salts such as sodium and potassium, and alkaline earth metal salts such as calcium and magnesium. These water reducing agents are classified into AE water reducing agents, high performance water reducing agents, high performance AE water reducing agents, and the like according to water reducing performance and air entrainment performance. Among these, the water reducing agent used in the present invention is preferably an AE water reducing agent from the viewpoint of ensuring workability (kneading property and workability) and durability, and more preferably lignin sulfonate as an active ingredient. It is an AE water reducing agent.
The amount of the water reducing agent added is preferably 0.1 to 5.0% by mass, more preferably 0.3 to 3.0% by mass, and still more preferably 0.5 to 2.0% by mass with respect to the cement. It is. If the value is less than 0.1% by mass, the water reducing performance is low, and if it exceeds 5.0% by mass, the setting of the cement may be delayed and the cost is increased.
また、任意の構成材料として、収縮ひび割れを防止する必要がある場合は、さらに膨張材および／または収縮低減剤を用いることができ、空気量を調節する必要がある場合はＡＥ剤を用いることができる。これは、ＡＥ減水剤としてもよい。また、舗装コンクリートの表面の乾燥を防ぐ必要がある場合は、塗膜養生剤を用いてもよい。 Further, as an optional constituent material, when it is necessary to prevent shrinkage cracking, an expansion material and / or a shrinkage reducing agent can be further used, and when it is necessary to adjust the air amount, an AE agent is used. it can. This may be an AE water reducing agent. Moreover, when it is necessary to prevent the surface of paving concrete from drying, a coating film curing agent may be used.
次に、本発明のコンクリート舗装の施工方法を説明する。
該施工方法は、特に制限されず、主に、(a)舗装コンクリートの舗設打設工程、(b)舗装コンクリートの敷き均し工程、(c)舗装コンクリートの締固め工程、(d)舗装
コンクリートの表面仕上げ工程、および(e)舗装コンクリートの養生工程の順に行われる。
また、本発明のコンクリート舗装の施工時において、前出のグルービング工法、または骨材露出工法を併用してもよく、また、該舗装の施工後において、前出の二一ト工法、ショットブラスト工法、またはダイヤモンドグラインディング工法を併用してもよい。
また、本発明のコンクリート舗装を構成する態様として、(a)車道用コンクリート舗装の全体を、本発明のコンクリート舗装で構成する態様と、(b)車道用コンクリート舗装の表層部のみを、本発明のコンクリート舗装で構成する態様が挙げられる。前記(b)において、本発明のコンクリート舗装により構成される表層部の厚さは、好ましくは、該舗装に含まれる粗骨材の最大粒径の３倍以上である。また、前記(b)の態様では、表層部以外の舗装部分は、一般的な車道用コンクリートやアスファルトで構成することができる。
Next, the concrete pavement construction method of the present invention will be described.
The construction method is not particularly limited. Mainly, (a) pavement concrete placing process, (b) pavement concrete leveling process, (c) pavement concrete compaction process, (d) pavement concrete The surface finishing process and (e) paving concrete curing process are performed in this order.
Further, at the time of construction of the concrete pavement of the present invention, the above-mentioned grooving method or aggregate exposure method may be used in combination, and after the pavement construction, the above-mentioned doublet method, shot blasting method Alternatively, a diamond grinding method may be used in combination.
In addition, as an aspect for constituting the concrete pavement of the present invention, (a) an aspect in which the entire concrete pavement for a roadway is constituted by the concrete pavement of the present invention, and (b) only a surface layer part of the concrete pavement for a roadway is provided in the present invention. The aspect comprised by concrete pavement of this is mentioned. In (b) above, the thickness of the surface layer portion constituted by the concrete pavement of the present invention is preferably at least three times the maximum particle size of the coarse aggregate contained in the pavement. Moreover, in the aspect of said (b), pavement parts other than a surface layer part can be comprised with general concrete for roadways, or asphalt.
以下、実施例により本発明を説明するが、本発明はこれらの実施例に限定されない。
使用材料について、表１に、舗装体の構成材料と、具体的な銘柄等、密度を示した。
EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples.
Regarding the materials used, Table 1 shows the density of the constituent materials and specific brands of the pavement.
製造方法
表２に、実施例、比較例のコンクリート配合と、空気量、水セメント比、単位粗骨材かさ容量、曲げ強度（材齢２８日）を示した。実施例１では、パーライトを細骨材とパーライトの合計体積の２０体積％となるように配合し、実施例２では、パーライトを細骨材とパーライトの合計体積の５０体積％となるように配合し、比較例１では、パーライトを無混入とし、比較例２では、パーライトを細骨材とパーライトの合計体積の８０体積％となるよう配合した。
Production method Table 2 shows the concrete blends of Examples and Comparative Examples, the air amount, the water cement ratio, the unit coarse aggregate bulk capacity, and the bending strength (age age 28 days). In Example 1, pearlite is blended to be 20% by volume of the total volume of fine aggregate and pearlite, and in Example 2, pearlite is blended to be 50% by volume of the total volume of fine aggregate and pearlite. In Comparative Example 1, pearlite was not mixed, and in Comparative Example 2, pearlite was blended so as to be 80% by volume of the total volume of fine aggregate and pearlite.
各材料を、表２の配合で、２０℃の恒温室内で、５５リットルの強制二軸形ミキサを用いて練り混ぜた。練上り直後に底面が台形状の角柱型枠（上程１５ｃｍ、下底２０ｃｍ、高さ１０ｃｍ）にコンクリートを打ち込み、金ごて仕上げの後、ほうき目仕上げを行った。その後、材齢２８日まで湿布養生を行った。 Each material was kneaded in a constant temperature room at 20 ° C. using a 55 liter forced biaxial mixer with the formulation shown in Table 2. Immediately after kneading, concrete was poured into a prismatic formwork with a trapezoidal bottom (upper part 15 cm, lower base 20 cm, height 10 cm). Thereafter, compressing was carried out until the age of 28 days.
材齢２８日の供試体に対して、回転式ラベリング試験機を用いて、表３の試験条件で試験を行った。
ラベリング試験の手順は、以下のとおりである。
(1)試験機に供試体を設置し、ノーマルタイヤによりプレロード走行を行う。
(2)プレロード走行終了後、すべり抵抗性ではノーマルタイヤで、耐摩耗性の試験ではスパイクチェーンを装着したタイヤで、それぞれ後述する所定の回転数で走行させる。
The test was conducted under the test conditions shown in Table 3 using a rotary labeling tester on specimens with a material age of 28 days.
The procedure of the labeling test is as follows.
(1) Install the specimen on the testing machine and perform preloading with normal tires.
(2) After the pre-loading is completed, the normal tire is used for slip resistance, and the tire is attached with a spike chain in the wear resistance test.
ノーマルタイヤを用いたすべり抵抗性の評価は、磨耗作用を与える前、１万回転、３万回転、５万回転、１０万回転、２０万回転および３０万回転後のそれぞれにおいて、日本道路協会Ｓ０２１−２「振り子式スキッドレジスタンステスタによるすべり抵抗測定方法」に準拠して、すべり抵抗性を測定した。
結果を表４に示す。
The evaluation of the slip resistance using normal tires is based on the Japan Road Association S021 before applying the wear action at 10,000 rotations, 30,000 rotations, 50,000 rotations, 100,000 rotations, 200,000 rotations and after 300,000 rotations. -2 "Slip resistance was measured in accordance with" Slip resistance measurement method using pendulum skid resistance tester ".
The results are shown in Table 4.
スパイクチェーンを用いた耐摩耗性の評価は、磨耗作用を与える前、１万回転、２万回転および３万回転後のそれぞれにおいて、日本道路協会Ｂ００２「ラベリング試験方法」（回転スパイクチェーン型）に準拠して、磨耗量を測定した。
結果を表５に示す。
Evaluation of wear resistance using spike chains was made according to the Japan Road Association B002 “Labeling Test Method” (rotary spike chain type) before applying wear action, after 10,000 rotations, 20,000 rotations and 30,000 rotations, respectively. The amount of wear was measured in conformity.
The results are shown in Table 5.
表４および表５から、いずれも、実施例１、２において、比較例１や比較例２より優れたすべり抵抗性と耐磨耗性が得られた。
From Tables 4 and 5, in Examples 1 and 2, both slip resistance and wear resistance superior to Comparative Example 1 and Comparative Example 2 were obtained.
Claims (2)
細骨材と無機質多孔質粉粒体の合計体積中の無機質多孔質粉粒体の体積が２０〜７０体積％であることを特徴とするコンクリート舗装。 Concrete pavement comprising cement, water, fine aggregate, coarse aggregate, water reducing agent and inorganic porous powder having a particle size of 1 mm or less,
A concrete pavement characterized in that the volume of the inorganic porous powder in the total volume of the fine aggregate and the inorganic porous powder is 20 to 70% by volume.
The concrete pavement according to claim 1, wherein the inorganic porous granular material is one or more types of granular material selected from aerated concrete, perlite, rock wool, and pumice cured by autoclave.
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| JP2018173314A (en) * | 2017-03-31 | 2018-11-08 | 住友大阪セメント株式会社 | Method for testing sliding resistance of concrete, method for selecting fine aggregate, and method for manufacturing concrete |
| JP2018193756A (en) * | 2017-05-17 | 2018-12-06 | 株式会社ガイアート | Concrete slab and manufacturing method of concrete slab |
| JP2021139228A (en) * | 2020-03-09 | 2021-09-16 | 住友大阪セメント株式会社 | Slip resistance improvement method and cement hardened body |
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