JP4182356B2 - Semi-flexible anti-freezing pavement method - Google Patents

Semi-flexible anti-freezing pavement method Download PDF

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JP4182356B2
JP4182356B2 JP2005155502A JP2005155502A JP4182356B2 JP 4182356 B2 JP4182356 B2 JP 4182356B2 JP 2005155502 A JP2005155502 A JP 2005155502A JP 2005155502 A JP2005155502 A JP 2005155502A JP 4182356 B2 JP4182356 B2 JP 4182356B2
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克也 原
正志 若井
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株式会社植木組
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    • 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
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本発明は道路舗装工事等における凍結抑制機能を有する半たわみ性凍結抑制舗装方法に関するものである。   The present invention relates to a semi-flexible freeze-reducing pavement method having a freeze-reducing function in road pavement work and the like.

この種の半たわみ性舗装は、空隙率の大きな開粒度アスコンを路面に敷き均しこの開粒度アスコン上にセメントミルクを敷き均し、開粒度アスコンの空隙にセメントミルクを浸透させ、アスファルト舗装のたわみ性とコンクリート舗装の剛性及び耐久性を複合的に活用しようとする舗装工法である。   This kind of semi-flexible pavement is a method of spreading asphalt pavement by spreading an open-graded ascon with a high porosity on the road surface, spreading cement milk on the open-graded ascon, This is a pavement method that tries to make use of the flexibility and rigidity and durability of concrete pavement.

一方、塩化物を含有するセメントミルクを用い、溶出塩分により凍結を抑制する効果を併せ持つ化学系凍結抑制舗装も提案されている。
特開平７−３１０３０３号公報 On the other hand, a chemical freezing suppression pavement that uses cement milk containing chloride and has the effect of suppressing freezing by the eluted salt content has also been proposed.
JP 7-310303 A

しかしながらこの従来舗装の場合、凍結抑制効果を塩分溶出量にのみ依存するため、凍結抑制機能の経年維持につき改善が必要であるという不都合を有している。   However, in the case of this conventional pavement, since the antifreezing effect depends only on the amount of salt elution, there is an inconvenience that it is necessary to improve the aging maintenance of the antifreezing function.

本発明はこれらの不都合を解決することを目的とするもので、本発明のうちで、請求項１記載の方法の発明は、開粒度アスファルトコンクリート（以下、「開粒度アスコン」という。）の空隙にセメントミルクを浸透させる半たわみ舗装を施工するに際し、上記セメントミルクは、超速硬性セメント、フライアッシュ、ベントナイト及び高性能減水剤からなるセメントミックスと、水と、塩化物と硬化遅延剤とからなり、上記開粒度アスコンの空隙率は２０％〜２８％であり、上記セメントミルクの配合割合は、セメントミルク１００重量％に対して、超速硬性セメント４０〜５５重量％、フライアッシュ５〜１５重量％、ベントナイト１．５〜３．０重量％及び高性能減水剤０．１〜０．２重量％からなるセメントミックスと、水３０〜３５重量％と、塩化物６〜１２重量％と硬化遅延剤０．０５〜０．１５重量％であることを特徴とする半たわみ性凍結抑制舗装方法にある。 The object of the present invention is to solve these disadvantages. Among the present inventions, the invention of the method according to claim 1 is a void of open-graded asphalt concrete (hereinafter referred to as “open-graded ascon”). When constructing a semi-flexible pavement that allows cement milk to penetrate the cement milk, the cement milk consists of a cement mix consisting of super-hard setting cement, fly ash, bentonite and a high-performance water reducing agent, water, chloride and a set retarder. The porosity of the open-graded ascon is 20% to 28%, and the blending ratio of the cement milk is 40 to 55% by weight of super fast-hardening cement and 5 to 15% by weight of fly ash with respect to 100% by weight of cement milk. A cement mix consisting of 1.5 to 3.0% by weight of bentonite and 0.1 to 0.2% by weight of a high-performance water reducing agent, and 30 to 3 of water Wt%, in a semi-flexible antifreezing pavement method is characterized in that 0.05 to 0.15% by weight set retarder and chloride 6-12% by weight.

本発明は上述の如く、請求項１記載の発明にあっては、開粒度アスファルトコンクリートの空隙にセメントミルクを浸透させる半たわみ舗装を施工するに際し、上記セメントミルクは、超速硬性セメント、フライアッシュ、ベントナイト及び高性能減水剤からなるセメントミックスと、水と、塩化物と硬化遅延剤とからなるので、塩分による氷着抑制効果、凹凸形状と材質差による氷着抑制効果、セメントミックスそのものの氷着抑制効果、特にセメントミックスに含まれるベントナイト等による剥がれ効果の三つの氷着抑制効果の相乗効果により凍結抑制効果の高い舗装を施工することができ、かつ、上記開粒度アスコンの空隙率は２０％〜２８％としているから、上記凹凸形状による氷着抑制効果を良好に発揮することができ、さらに、上記セメントミルクの配合割合は、セメントミルク１００重量％に対して、超速硬性セメント４０〜５５重量％、フライアッシュ５〜１５重量％、ベントナイト１．５〜３．０重量％及び高性能減水剤０．１〜０．２重量％からなるセメントミックスと、水３０〜３５重量％と、塩化物６〜１２重量％と硬化遅延剤０．０５〜０．１５重量％であるから、塩分による氷着抑制効果、凹凸形状と材質差による氷着抑制効果、セメントミックスそのものの氷着抑制効果を一層良好に発揮することができる。 As described above, in the invention according to claim 1, when the semi-flexible pavement in which cement milk is permeated into the voids of the open-graded asphalt concrete is applied, the cement milk is composed of super-hard cement, fly ash, Because it consists of bentonite and a high-performance water reducing agent, water, chloride, and a set retarder, it suppresses ice formation due to salt, ice prevention due to uneven shape and material difference, and ice adhesion of the cement mix itself. It is possible to construct a pavement with a high freezing suppression effect by the synergistic effect of the three ice adhesion suppression effects of the suppression effect, in particular the peeling effect due to bentonite etc. contained in the cement mix , and the porosity of the above open grained ascon is 20% Since it is set to ˜28%, it is possible to satisfactorily demonstrate the ice adhesion suppressing effect due to the uneven shape, The blending ratio of the cement milk is 40 to 55% by weight of super fast-hardening cement, 5 to 15% by weight of fly ash, 1.5 to 3.0% by weight of bentonite, and high-performance water reducing agent 0 with respect to 100% by weight of cement milk. 0.1 to 0.2% by weight cement mix, 30 to 35% by weight water, 6 to 12% by weight chloride, and 0.05 to 0.15% by weight curing retarder, so ice icing by salt The suppression effect, the ice adhesion suppression effect due to the uneven shape and material difference, and the ice adhesion suppression effect of the cement mix itself can be exhibited more satisfactorily.

図１は本発明の実施の形態例の概念図を示し、１は開粒度アスファルトコンクリート（以下、「開粒度アスコン」という。）であって、この開粒度アスコン１の空隙にセメントミルク２を浸透させて半たわみ舗装を施工することになる。   FIG. 1 is a conceptual diagram of an embodiment of the present invention, where 1 is an open-graded asphalt concrete (hereinafter referred to as “open-graded ascon”), and cement milk 2 penetrates into the voids of the open-graded ascon 1. We will make a semi-flexible pavement.

ここに開粒度アスコンとは、開粒度アスファルト混合物の表層をもつ舗装をいい、開粒度アスファルト混合物とは、粗骨材、細骨材、フィラー、アスファルトからなる加熱アスファルト混合物で合成粒度における２．３６ｍｍ通過分が１５〜３０％の範囲のものをいい、この混合物の路面はきわめて粗く、主としてすべり止め用混合物として用い、アスファルトとは、天然にまたは石油の蒸留残渣として得られる瀝青（二流化炭素に溶ける炭化水素混合物）主成分とする半固体あるいは固体の粘着性物質をいい、この石油アスファルトのうち、通常、舗装用に用いるのは、針入度４０〜１２０程度のストレートアスファルトでこれを舗装用石油アスファルトと呼んでいる。   Here, the open-graded asphalt is a pavement having a surface layer of an open-graded asphalt mixture, and the open-graded asphalt mixture is a heated asphalt mixture composed of coarse aggregate, fine aggregate, filler, and asphalt and has a composite particle size of 2.36 mm. This means that the passage is 15-30%. The road surface of this mixture is very rough and is mainly used as an anti-slip mixture. Asphalt is a bitumen (naturally produced as a distillation residue of petroleum). Soluble hydrocarbon mixture) Semi-solid or solid sticky substance as the main component. Of this petroleum asphalt, the one used for pavement is usually straight asphalt with a penetration of about 40 to 120. It is called petroleum asphalt.

この場合、上記開粒度アスコン１の空隙率は２０％〜２８％となっており、又、上記セメントミルク２は、超速硬性セメント、フライアッシュ、ベントナイト及び高性能減水剤からなるセメントミックスと、水と、塩化物と硬化遅延剤とからなる。   In this case, the porosity of the open particle size ascon 1 is 20% to 28%, and the cement milk 2 is composed of a cement mix composed of super fast hardened cement, fly ash, bentonite and a high-performance water reducing agent, and water. And a chloride and a curing retarder.

ここに、上記超速硬性セメントとは、水を加えると約３時間程度で所定の強度が発現するセメントであって、普通ポルトランドセメントに比較して酸化アルミニウム量が多く、酸化マグネシウム、三酸化硫黄を新たに添加しているものをいい、又、フライアッシュとは、混和材の一種で、発電所等で発生するススであり、普通ポルトランドセメントに混合してフライアッシュセメントとし、セメント質量の５％以上用いるものを混和材といい、セメント質量の１％未満を用いるものを混和剤という。   Here, the ultrafast cement is a cement that exhibits a predetermined strength in about 3 hours when water is added, and has a larger amount of aluminum oxide than ordinary Portland cement, and contains magnesium oxide and sulfur trioxide. Newly added, fly ash is a kind of admixture, soot generated at power plants, etc., mixed with ordinary Portland cement to make fly ash cement, 5% of cement mass Those used above are called admixtures, and those using less than 1% of the cement mass are called admixtures.

又、ベントナイトとは、ベントナイトは粘土鉱物の一つで、比表面積が非常に高いモンモリロナイトという鉱物が主成分である粘土鉱物の一つである。   Bentonite is one of clay minerals and one of clay minerals mainly composed of a mineral called montmorillonite having a very high specific surface area.

又、塩化物とは、一般に塩素を含む化合物であり、ＮａＣｌ（塩）、ＫＣｌ（塩化カリウム）等があり、また、塩化物のほかにも凍結抑制機能を有するもので酢酸カリウムやギ酸等を用いることもある。   Chlorides are generally compounds containing chlorine, such as NaCl (salt), KCl (potassium chloride), etc. In addition to chlorides, those having a freeze-inhibiting function such as potassium acetate and formic acid. Sometimes used.

又、高性能減水剤とは、セメント粒子を分散させることにより所定の施工性の良さを得るために、必要な水の量を減らすことを目的とする混和剤で特に高性能のものをいいい、又、硬化遅延剤とは、超速硬セメントは硬化時間が非常に早いため、施行に必要な時間にあわせて硬化を遅らせるために使用される。   A high-performance water reducing agent is an admixture intended to reduce the amount of water required in order to obtain a predetermined good workability by dispersing cement particles. In addition, the curing retarder is used to delay the curing according to the time required for the execution because the ultrafast cement has a very fast curing time.

この場合、セメントミルクは、表１の如く、セメントミルク１００重量％に対して、超速硬性セメント４０〜５５重量％、フライアッシュ５〜１５重量％、ベントナイト１．５〜３．０重量％及び高性能減水剤０．１〜０．２重量％からなるセメントミックスと、水３０〜３５重量％と、塩化物６〜１２重量％と硬化遅延剤０．０５〜０．１５重量％の配合割合のものが用いられている。 In this case, as shown in Table 1, the cement milk is 40 to 55% by weight of super fast-hardening cement, 5 to 15% by weight of fly ash, 1.5 to 3.0% by weight of bentonite and high with respect to 100% by weight of cement milk. A mixing ratio of 0.1 to 0.2% by weight of a water reducing agent, 30 to 35% by weight of water, 6 to 12% by weight of chloride and 0.05 to 0.15% by weight of a retarder Things are used.

Figure 0004182356
Figure 0004182356

又、セメントミルク２の品質として、圧縮強度８Ｎ／ｍｍ2以上（三日間養生）、フロー値（Ｐフロート法）１２秒以下（練り混ぜ完了後）、硬化時間２〜５時間のものが用いられ、セメントミルク２の使用量（Ｌ）は、施工面積（ｍ2）×アスコン厚（ｍ）×（空隙率÷１００）×１０００とし、アスコン厚は４〜１０ｃｍとするのが望ましい。 The cement milk 2 has a compressive strength of 8 N / mm 2 or more (cured for 3 days), a flow value (P float method) of 12 seconds or less (after completion of kneading), and a curing time of 2 to 5 hours. The amount of cement milk 2 used (L) is preferably the construction area (m 2 ) × ascon thickness (m) × (void ratio ÷ 100) × 1000, and the ascon thickness is preferably 4-10 cm.

この実施の形態例にあっては、例えば、道路の施工面のアスファルトコンクリート舗装、コンクリート舗装等からなる基層Ｗ上に開粒度アスコン１を敷設施工し、開粒度アスコン１の乾燥を確認し、表面の浮石、土等の付着物を除去して清掃し、施工しない箇所はテープ等でマスキングし、開粒度アスコン１の両端小口をモルタル等のシール材で塞ぎ、セメントミルク２の流出を防ぐための施工準備作業を行い、一方、現地等において、グラウトミキサーを用いて、超速硬性セメント、フライアッシュ、ベントナイト及び高性能減水剤からなるセメントミックスと、水と、塩化物と硬化遅延剤とからセメントミルク２を所定配合割合に混合撹拌して作製し、そして、この混練したセメントミルク２を上記開粒度アスコン上１に敷き均し、開粒度アスコン１表面にセメントミルク２を滞留させながらゴムレーキ等で広げ、滞留状態で振動ローラ等を用いて気泡が出なくなるまで振動浸透させ、セメントミルク２の粘性が高くなったのを見計らって余剰のセメントミルク２をゴムレーキ等で除去し、浸透完了後はセメントミルク２が硬化するまで、施工区域内に立ち入らないようにて養生し、万一、養生中に雨が降った場合には、直ちに養生シートで覆い、雨養生を行い、セメントミルク２が硬化し、養生期間が経過したらマスキングテープを除去し、周囲の清掃を行い、すべての作業終了後に交通開放を行うことになる。   In this embodiment, for example, an open-graded ascon 1 is laid and constructed on a base layer W composed of asphalt concrete pavement, concrete pavement, etc. on the road construction surface. To remove the adhering material such as floating stones and soil, mask the parts not to be constructed with tape, etc., and plug both ends of the open-graded ascon 1 with sealing material such as mortar to prevent the cement milk 2 from flowing out. On the other hand, on site, using a grout mixer, cement milk consisting of super fast hardened cement, fly ash, bentonite and high-performance water reducing agent, water, chloride and hardening retarder 2 is mixed and stirred at a predetermined blending ratio, and the kneaded cement milk 2 is spread on the above open grained ascon 1 and spread. Spread the cement milk 2 on the surface of the Ascon 1 with rubber rake, etc., and let it vibrate until no bubbles are generated using a vibrating roller etc. in the staying state. Remove the milk 2 with rubber rake, etc., and after completion of the penetration, cure the cement milk 2 so that it does not enter the construction area until the cement milk 2 has hardened. After the curing period elapses, the masking tape is removed, the surroundings are cleaned, and traffic is opened after all the work is completed.

ここに、注意すべき事として、セメントミルク２の浸透施工前においては、開粒度アスコンの表面温度が５０℃以下になるまで養生が必要であり、マスキング時において、水分はバーナー等で乾燥除去すると共に石粉等は箒やブロワーで取り除かなければならず、開粒度アスコン内に水分が残っている状態でセメントミルク２を充填すると表面に浮き水が生じ、仕上がりが悪くなり、セメントミルク２の強度が低下することがあるからであり、又、セメントミルク２の浸透施工中においては、セメントミルク２の性状は施工当日の気温や水の温度により多少異なるのでＰロートを用いてフロー値を測定し、水温の調節を行う必要があり、セメントミルク２の混練完了後約１５分を経過すると粘性が高くなり、施工性が低下するのでセメントミルク２の混練完了後は直ちに開粒度アスコン１上に充填浸透を行う注意が必要である。   It should be noted here that before the cement milk 2 is infiltrated, curing is necessary until the surface temperature of the open-graded ascon is 50 ° C. or less, and moisture is removed by drying with a burner or the like at the time of masking. At the same time, stone powder and the like must be removed with a jar or blower. When the cement milk 2 is filled with moisture remaining in the open-graded ascon, floating water is generated on the surface, the finish is deteriorated, and the strength of the cement milk 2 is reduced. In addition, during the penetration of cement milk 2, the properties of cement milk 2 are slightly different depending on the temperature and water temperature on the day of construction, so the flow value is measured using a P funnel, It is necessary to adjust the water temperature, and after about 15 minutes have passed since the mixing of the cement milk 2, the viscosity increases and the workability deteriorates. After kneading the completion of click 2 care should be taken to carry out the filling osmotic immediately on open-graded asphalt 1.

結合材として、改質アスファルトＩＩ型、高粘度改質アスファルト等のアスファルトが使用され、この改質アスファルトとは、通常のストレートアスファルトにゴムや熱可塑性エラストマー改質剤として添加したもの、あるいはブローイングなどの改質操作を加えたものをいい、主なものに改質アスファルトＩＩ型、排水性舗装用高粘度改質アスファルト、セミブローンアスファルトなどがあり、この場合、下記表２、表３に示す、粒度分布を有する開粒度骨材及ぶマーシャル基準値をもつ空隙率２５％の開粒度アスコン１を敷設することとした。   As the binder, asphalt such as modified asphalt type II and high viscosity modified asphalt is used, and this modified asphalt is a material added to normal straight asphalt as a rubber or thermoplastic elastomer modifier, or blowing, etc. The main operations are modified asphalt type II, high-viscosity modified asphalt for drainage pavement, semi-blown asphalt, etc. In this case, shown in the following Table 2 and Table 3, It was decided to lay an open particle size ascon 1 having an open particle size aggregate having a particle size distribution and a porosity of 25% having a Marshall standard value.

Figure 0004182356
Figure 0004182356

Figure 0004182356
Figure 0004182356

そして、このセメントミルク２にあっては、表４に示す試料１、表５に示す試料２を作製し、かつ、表６に示す、従来工法の比較試料を作製し、開粒度アスコン１上に試料１、試料２及び比較試料のセメントミルク２を浸透施工し、各試料の氷着引張試験を行った。   And in this cement milk 2, the sample 1 shown in Table 4 and the sample 2 shown in Table 5 are produced, and the comparative sample of a conventional construction method shown in Table 6 is produced, and on the open grain size ascon 1 Sample 1, sample 2 and comparative sample cement milk 2 were infiltrated and subjected to an ice adhesion tensile test.

この氷着引張試験にあっては、凍結抑制舗装技術研究会が提唱したものが用いられ、即ち、ニードルパンチの不織布を下部に貼り付けた直径１０ｃｍ、厚さ２．０ｃｍの鉄板を不織布の厚さを超えないように２〜３ｍｍの深さに水をはった（２５０ｃｃ程度）供試体の上に装着し、低温室にて所定の温度で２４時間、氷着固定し、また、鉄板の装着時はニードルパンチに十分に水を吸わせ、空気たまりを抜き、次に、特殊な引張り試験機で氷着固定した鉄板を舗装供試体から引き離し、そのときの引張り力を氷着引張力とする。この氷着温度は−３℃、−５℃、−８℃とし、試験終了後、塩分濃度を測定するという方法である。   In this ice adhesion tensile test, the one proposed by the Freezing Suppression Pavement Technology Study Group is used, that is, an iron plate having a diameter of 10 cm and a thickness of 2.0 cm with a needle punch nonwoven fabric pasted on the bottom is used as the thickness of the nonwoven fabric. Mounted on a specimen (approx. 250 cc) with a water depth of 2-3 mm so as not to exceed the thickness, fixed in ice at a predetermined temperature for 24 hours in a cold room, When installing, allow the needle punch to sufficiently absorb water, remove air pools, and then pull the iron plate fixed with ice with a special tensile tester from the pavement specimen, and the tensile force at that time will be referred to as the ice adhesion tensile force. To do. This ice deposition temperature is set to −3 ° C., −5 ° C., and −8 ° C., and the salt concentration is measured after the test is completed.

Figure 0004182356
Figure 0004182356

Figure 0004182356
Figure 0004182356

Figure 0004182356
Figure 0004182356

ここ結果、下記表７の試験結果を得た。   As a result, the test results shown in Table 7 below were obtained.

Figure 0004182356
Figure 0004182356

この試験結果を分析すると、従来工法の比較試料に比べ、試料１及び試料２は明らかに氷着引張力は小さく、したがって、凍結抑制効果が大きく、又、凍結温度による氷着引張力の影響は非常に小さいことが認められ、一つには、塩分による氷着抑制効果、即ち、塩分による氷結温度の低下による剥がれ効果、二つには、凹凸形状と材質差による氷着抑制効果、即ち、路面の大きな凹凸と、アスファルト骨材とセメントミルクの材質の差（熱膨張率、表面形状）による剥がれ効果、三つには、セメントミックスそのものの氷着抑制効果、即ち、セメントミックスに含まれるベントナイト等による剥がれ効果の三つの氷着抑制効果の相乗効果により明らかな凍結抑制効果が認められたものと推測される。   When this test result is analyzed, sample 1 and sample 2 clearly have smaller ice adhesion tensile force than the comparative sample of the conventional method, and therefore, the freezing suppression effect is large, and the influence of the ice adhesion tensile force due to the freezing temperature is It is recognized that it is very small, one is the ice prevention effect due to salinity, that is, the peeling effect due to the decrease in freezing temperature due to salt, and the second is the ice prevention effect due to the uneven shape and material difference, The large unevenness of the road surface and the peeling effect due to the difference in the material between the asphalt aggregate and the cement milk (thermal expansion coefficient, surface shape), and third, the ice adhesion suppression effect of the cement mix itself, that is, bentonite contained in the cement mix It is presumed that a clear freezing-inhibiting effect was recognized by the synergistic effect of the three ice accretion-inhibiting effects of the peeling effect due to the above.

又、この場合、上記開粒度アスコンの空隙率は２０％〜２８％としているから、上記凹凸形状による氷着抑制効果を良好に発揮することができ、又、この場合、上記セメントミルクの配合割合は、セメントミルク１００重量％に対して、超速硬性セメント４０〜５５重量％、フライアッシュ５〜１５重量％、ベントナイト１．５〜３．０重量％及び高性能減水剤０．１〜０．２重量％からなるセメントミックスと、水３０〜３５重量％と、塩化物６〜１２重量％と硬化遅延剤０．０５〜０．１５重量％であるから、塩分による氷着抑制効果、凹凸形状と材質差による氷着抑制効果、セメントミックスそのものの氷着抑制効果を一層良好に発揮することができる。 In this case, since the porosity of the open-graded ascon is 20% to 28%, the effect of suppressing ice adhesion due to the uneven shape can be satisfactorily exhibited. In this case, the blending ratio of the cement milk Is 100% by weight of cement milk , 40 to 55% by weight of super fast-hardening cement, 5 to 15% by weight of fly ash, 1.5 to 3.0% by weight of bentonite, and 0.1 to 0.2 of a high-performance water reducing agent. Cement mix consisting of wt%, water 30-35 wt%, chloride 6-12 wt% and cure retarder 0.05-0.15 wt% The effect of suppressing ice formation due to the difference in material and the effect of suppressing ice formation of the cement mix itself can be exhibited even better.

尚、本発明は上記実施の形態例に限られるものではなく、開粒度アスファルトコンクリートの材質、空隙率、超速硬性セメント、フライアッシュ、ベントナイト及び高性能減水剤の材質や配合割合、塩化物及び硬化遅延剤の材質等は適宜変更して設計施工されるものである。   The present invention is not limited to the above embodiment, but the material of open-graded asphalt concrete, porosity, super fast hardened cement, fly ash, bentonite and materials and blending ratios of high-performance water reducing agent, chloride and hardening The material and the like of the retarder are appropriately changed and designed and constructed.

以上、所期の目的を充分達成することができる。   As described above, the intended purpose can be sufficiently achieved.

本発明の実施の形態例の全体概念図である。1 is an overall conceptual diagram of an embodiment of the present invention.

符号の説明Explanation of symbols

１ 開粒度アスコン
２ セメントミルク
1 Open grain size ascon 2 Cement milk

Claims (1)

開粒度アスファルトコンクリート（以下、「開粒度アスコン」という。）の空隙にセメントミルクを浸透させる半たわみ舗装を施工するに際し、上記セメントミルクは、超速硬性セメント、フライアッシュ、ベントナイト及び高性能減水剤からなるセメントミックスと、水と、塩化物と硬化遅延剤とからなり、上記開粒度アスコンの空隙率は２０％〜２８％であり、上記セメントミルクの配合割合は、セメントミルク１００重量％に対して、超速硬性セメント４０〜５５重量％、フライアッシュ５〜１５重量％、ベントナイト１．５〜３．０重量％及び高性能減水剤０．１〜０．２重量％からなるセメントミックスと、水３０〜３５重量％と、塩化物６〜１２重量％と硬化遅延剤０．０５〜０．１５重量％であることを特徴とする半たわみ性凍結抑制舗装方法。 When constructing a semi-flexible pavement that allows cement milk to penetrate into the voids of open-graded asphalt concrete (hereinafter referred to as “open-graded ascon”), the cement milk is composed of super fast-hardening cement, fly ash, bentonite and high-performance water reducing agent. The cement mix is composed of water, chloride and a set retarder, the porosity of the open-graded ascon is 20% to 28%, and the blending ratio of the cement milk is 100% by weight of the cement milk. A cement mix comprising 40 to 55% by weight of a super fast hard cement, 5 to 15% by weight of fly ash, 1.5 to 3.0% by weight of bentonite and 0.1 to 0.2% by weight of a high-performance water reducing agent, and 30 water 35 wt% and, semi flexible, which is a 0.05 to 0.15% by weight set retarder and chloride 6-12 wt% Sintering suppression paving way.
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