<var id="lrprb"></var>

    <listing id="lrprb"></listing>

      <address id="lrprb"><big id="lrprb"><progress id="lrprb"></progress></big></address>

        <form id="lrprb"><sub id="lrprb"></sub></form>

          <track id="lrprb"><sub id="lrprb"></sub></track>

          <noframes id="lrprb">

            <thead id="lrprb"></thead><ol id="lrprb"><font id="lrprb"><pre id="lrprb"></pre></font></ol>

              <track id="lrprb"></track><dfn id="lrprb"><address id="lrprb"></address></dfn>

                <video id="lrprb"><progress id="lrprb"><nobr id="lrprb"></nobr></progress></video>

                聯系電話:13292436688

                河北貝卡纖維制造有限公司
                電話:13292436688
                聯系人:劉淑賢
                地址:河北唐山玉田楊家套
                網址:www.www.tjejtrampet.com
                當前位置:鋼纖維混凝土材料的選擇
                鋼纖維混凝土材料的選擇
                [來源:http://www.www.tjejtrampet.com] [作者:aowl] [日期:18-06-05] [瀏覽次數:]
                一、剪切型鋼纖維的主要性能 The main properties of shear type steel fiber 1、抗拉強度 1. Tensile strength 為使鋼纖維混凝土具有良好的力學性能,要求鋼纖維具有一定的抗拉強度。鋼纖維的抗拉強度,根據鋼纖維的材質和生產工藝不同,其抗拉強度也有所區別。剪切型鋼纖維的抗拉強度一般為380~800MPa。 In order to make steel fiber reinforced concrete have good mechanical properties, steel fiber must have certain tensile strength. The tensile strength of steel fiber varies according to the material and production technology of steel fiber. The tensile strength of shear steel fiber is generally 380~800MPa. 2、粘結強度 2. Bond strength 鋼纖維的粘結強度,可按《鋼纖維混凝土試驗方法標準》(CECS13:89)用直接拉拔法測定鋼纖維與水泥砂漿之間的粘結強度。 The bond strength of steel fiber can be measured by the direct drawing method of steel fiber concrete test method (CECS13:89). 由于鋼纖維混凝土的破壞主要是鋼纖維的拔出而不是拉斷,因此鋼纖維的增強主要取決于鋼纖維混凝土基體界面的粘結強度。提高粘結強度除與基體的性能有關外,就鋼纖維本身來說,應該從鋼纖維的表面和形狀來改善它與基體的粘結性能。為了提高鋼纖維的粘結強度,常采用:使鋼纖維表面粗糙化、截面呈不規則形,增加與基體的接觸面積和摩擦力;將鋼纖維表面壓痕,或壓成波形,增加機械粘結力;使鋼纖維的兩端異形化,將兩端制成彎鉤或大頭形等,以提高其錨固力和抗拔力。 Because the damage of steel fiber concrete is mainly the pulling out of steel fiber, not breaking, the reinforcement of steel fiber mainly depends on the bond strength of the interface of the steel fiber reinforced concrete matrix. In addition to the improvement of the bond strength, the bond properties of the steel fiber should be improved from the surface and shape of the steel fiber, as far as the properties of the matrix are concerned. In order to improve the bond strength of steel fiber, it is often used to make the surface of the steel fiber rough, the cross section is irregular, the contact area and the friction force of the steel fiber are increased, the surface of the steel fiber is indentation, or pressure is pressed into the wave form, and the mechanical bonding force is increased; the two ends of the steel fiber are specialized, and the two ends are made of crooked hook or large head shape. High anchorage and pulling resistance. 試驗表明,異形鋼纖維比平直形鋼纖維的增強效果可提高約一倍。 The experiment shows that the reinforcing effect of profiled steel fiber can be approximately doubled than that of plain steel fiber. 3、硬度 3, hardness 各種鋼纖維的表面硬度較高,在與混凝土攪拌時,一般不易發生彎折現象。鋼纖維應能經受沿直徑為3mm鋼棒彎折90度不斷。 The surface hardness of all kinds of steel fibers is high, and it is not easy to bend when mixed with concrete. Steel fibers should be able to withstand bending 90 degrees along the diameter of 3mm steel rods. 4、耐腐蝕性 4, corrosion resistance 澆筑在鋼纖維混凝土內部的鋼纖維,只要搗固密實,與空氣隔絕,鋼纖維一般不發生銹蝕現象。露于混凝土表面或在裂縫寬度超過0.25mm時,跨接在裂縫處的鋼纖維,易發生腐蝕現象。 Steel fibers poured in the steel fiber reinforced concrete will not corrode steel fibers if they are tamper with and are isolated from the air. When exposed to the concrete surface or when the crack width exceeds 0.25mm, the steel fibers straddled at the crack will easily corrode. 二、鋼纖維的幾何參數和體積率 Two. The geometric parameters and volume rate of steel fiber 表示鋼纖維幾何參數的有鋼纖維長度、直徑(等效直徑)及長徑比。 The geometric parameters of steel fiber are steel fiber length, diameter (equivalent diameter) and aspect ratio. 鋼纖維長度指鋼纖維兩端點間的直線距離,用Lf 表示,其尺寸可為15~60mm。 The length of steel fiber refers to the straight distance between the ends of the steel fibers. The size of the steel can be 15~60mm by Lf. 鋼纖維截面的直徑或等效直徑(當鋼纖維為非圓形截面時,其截面積相當于圓形截面面積時計算所得到的直徑),用df 表示通常為0.3~1.2mm。 The diameter of the steel fiber section or the equivalent diameter (when the steel fiber is a non circular section, the diameter of the section is equivalent to the area of the circular section), which is usually expressed as 0.3~1.2mm by DF. 鋼纖維的長徑比即指鋼纖維的長度與直徑或等效直徑之比,即Lf/ df,通常為30~100。 The ratio of length to diameter of steel fiber refers to the ratio of length to diameter or equivalent diameter of steel fiber, that is, Lf/ DF, usually 30~100. 鋼纖維體積率,指鋼纖維所占鋼纖維混凝土體積的百分數。用pf 表示,它表明鋼纖維在拌合料中摻入量的多少。 The volume fraction of steel fiber refers to the percentage of steel fiber concrete volume occupied by steel fibers. It is indicated by PF that it shows the amount of steel fiber mixed in the mixture.

                版權 ? 河北貝卡纖維制造有限公司 網址:www.www.tjejtrampet.com
                保定網站建設及優化保定遨游網絡公司

                  <var id="lrprb"></var>

                  <listing id="lrprb"></listing>

                    <address id="lrprb"><big id="lrprb"><progress id="lrprb"></progress></big></address>

                      <form id="lrprb"><sub id="lrprb"></sub></form>

                        <track id="lrprb"><sub id="lrprb"></sub></track>

                        <noframes id="lrprb">

                          <thead id="lrprb"></thead><ol id="lrprb"><font id="lrprb"><pre id="lrprb"></pre></font></ol>

                            <track id="lrprb"></track><dfn id="lrprb"><address id="lrprb"></address></dfn>

                              <video id="lrprb"><progress id="lrprb"><nobr id="lrprb"></nobr></progress></video>
                              妓女asianmovies孕妇_爱啪啪av导航_国产高跟黑色丝袜在线_极品丰满国模自慰