玻璃纖維筋常見(jiàn)問(wèn)答

作者：創(chuàng)始人時(shí)間：2022-01-07 17:39:04 點(diǎn)擊：1

信息摘要：玻璃纖維筋常見(jiàn)客戶(hù)問(wèn)題

Q: Can we shear cut GFRP rebar?

A: NO, GFRP rebar is orthotropic and non-ductile material, GFRP can be cut using steel saw, a band saw and or grinder with a diamond blade.

Q: How to tie GFRP rebar together?

A: Tie GFRP Rebar with stainless steel or nylon tie wire, you may use heavy-duty zip tie too， Or U-shaped buckles.

Q: Can we bend Gfrp rebar in the workshop or on site?

A: Gfrp rebar is manufactured with Vinyl-Ester Thermoset Matrix, you cannot bend Gfrp rebar after curing cycle, all the bends have to be fabricated in Chengxinda FRP Manufacturing Plants in China Taiyuan.

Q: Can we bend Chengxinda in the workshop or on site?

A: Chengxinda is manufactured with a unique & patented method using Thermoplastic & Corrosion-resistant glass fiber. Chengxinda can be re-heat and re-shape just like any other thermoplastic. Apply the heat to 200°C (Centigrade) until adequate softness achieves, use proper tools and jig to bend. (NOTE: to have maximum strength, avoid buckling and dislocating the fibers).

Q: How to lift long the bundle of Chengxinda & Gfrp rebar from a flatbed ruck?

A: GFRP rebar is more elastic than regular steel bar therefore always avoid excessive deflections of the bars. Always use a spreader bar when hoisting bundle of GFRP rebar.

Q: How does the strength of MST-BAR < and MFX-BAR < compare with steel?

A: The tensile strength of MST-BAR < and MFX-BAR < are both greater than 1000 MPa (145 ksi). Compared with steel, GFRP steel bars can bear twice the tensile load before failure.

Q: How does the elastic modulus of MST-BAR < and MFX-BAR < compare with steel?

A: The tensile modulus of MST-BAR < and MFX-BAR < are both greater than 65 GPa (9427 ksi). Compared with steel, GFRP steel bar is more flexible.

Q: How does the strain of MST-BAR < and MFX-BAR < compare with steel?

A: The tensile strains of MST-BAR < and MFX-BAR < are between 1.5% and 2.5%. Compared with steel, the strain of GFRP steel bar is lower than that of steel.

Q: What are the resistance of MST-BAR < and MFX-BAR < to alkaline environment?

A: Both MST-BAR #and MFX-BAR #have been tested for durability according to CSA and ACI standards. After exposure to alkaline solution with pH value of 13 for 2160 hours, they all maintain the ultimate tensile capacity of +90% at 60 degrees Celsius. Compared with steel, GFRP steel bars are more resistant to even stainless steel.

Q: What is the maximum operating temperature of MST-BAR < and MFX-BAR <?

A: The working temperature of any other composite products, such as GFRP, FRP and CFRP, GFRP, BFRP and AFRP, depends on the glass transition temperature or service temperature of the matrix or polymer, has nothing to do with glass or basalt, has nothing to do with the type of fiber and has a very high melting and operating temperature of carbon fibers. Both MST-BAR < and MFX-BAR < can provide high operating temperature. The glass transition temperature of MST-BAR < is Celsius, and the working temperature of MFX-BAR < is 110 Celsius.

Q: What is the minimum operating temperature of MST-BAR < and MFX-BAR <?

A: Both MST-BAR #and MFX-BAR #have been tested at -40 degrees Celsius according to CSA and ACI standards. The effect is zero, and in some cases the performance has been improved.

Q: How does the price of Chengxinda fiberglass reinforcement compare with that of threaded reinforcement?

A: According to the calculation of tons, the cost of Chengxinda fiberglass reinforcement is 2 to 4 times that of threaded reinforcement. Keep in mind that stainless steel bars will corrode. According to length, the weight of fiberglass reinforcement is 1/4 of that of threaded reinforcement, and more fiberglass reinforcement can be purchased at the same cost.

Q: How does Chengxinda glass fiber reinforced bar compare with the price of epoxy coated steel bar (ECR) and galvanized steel bar?

Answer: The price of Chengxinda glass fiber reinforced bar is usually comparable to that of galvanized and epoxy resin coated steel bar. The total installation cost usually makes the price of GFRP thread steel more competitive.

Q: Do we have to consider the initial cost of threaded steel?

A: At the end of the project, when comparing the cost of materials, it is absolutely not the case to consider that the use of Singxinda fiberglass reinforced materials is usually more expensive than carbon steel. However, when considering installation, handling, transportation, long-term maintenance and other related costs, the total installation cost of FRP is more competitive for carbon steel.

Q: Why did the use of Singxinda fiberglass ribs reduce project costs?

A: Intelligent designers always consider all the related costs of the project, and some of these factors can be eliminated when considering the use of Chengxinda fiberglass reinforcement.

Installation time

transport

Processing and cutting

Surface Covering and Removal Ability of Waterproof Film and 65mm Asphalt

Seawater solidified concrete

Short-term and long-term maintenance costs

Q: How does the price of Chengxinda fiberglass reinforcement compare with that of threaded reinforcement?

Q: How does Chengxinda glass fiber reinforced bar compare with the price of epoxy coated steel bar (ECR) and galvanized steel bar?

A: The price of Chengxinda glass fiber reinforced bar is usually comparable to that of galvanized and epoxy resin coated steel bar. The total installation cost usually makes the price of GFRP thread steel more competitive.

Q: Do we have to consider the initial cost of threaded steel?

Q: What design guidelines should designer follow?

A: There are number of design guidelines available from CSA & ACI.

China

JT/T406-2003 Glass Fiber Reinforced Bars for Civil Engineering

Technical Specification for Engineering Application of GB50608-2010 Fiber Reinforced Composite

Canada

CSA

CAN/CSA-S6-06(Canadian highway bridge design code)

CAN/CSA-S806-02(Design and construction of building component with FRP)

ISIS

Design Manual NO.3 (reinforcement concrete structure with FRP)

Design Manual NO.5 (Prestressing concrete structure with FRP )

USA

ACI

ACI 440.1R-06

ACI 440R-07

ACI 440.5-08

ACI 440.6-08

AASHTO GFRP-1

Q: Can we expose Chengxinda fiberglass tendons in the sun?

A: No, Chengxinda fiberglass ribs are made of thermosetting matrix. Because of cost competitiveness, they can be degraded by ultraviolet radiation without ultraviolet inhibiting adhesives. Always use direct ultraviolet radiation to cover Chengxinda fiberglass ribs.

Q: Can we expose Chengxinda fiberglass tendons in the sun?

A: Yes, Chengxinda fiberglass tendons have strong anti-ultraviolet radiation ability and can be preserved for a long time without degradation.

Question: How can Chengxinda fiberglass reinforcement be recycled?

A: Chengxinda Glass Fiber Reinforcement is 100% recyclable and environmentally friendly manufacturing.

問(wèn)：我們可以剪切玻璃鋼鋼筋嗎？

答：不，玻璃鋼鋼筋是正交異性和非延性材料，玻璃鋼可以用鋼鋸、帶鋸或金剛石刀片磨床切割。

問(wèn)：如何將玻璃鋼鋼筋綁在一起？

答：用不銹鋼或尼龍?jiān)鷰Ы壸〔Ａт撲摻睿部梢杂弥匦屠溁騏型扣。

問(wèn)：我們可以在車(chē)間或現(xiàn)場(chǎng)彎曲玻璃鋼鋼筋嗎？

答：玻璃鋼鋼筋采用乙烯基酯熱塑性基體制作，固化循環(huán)后不能彎曲，所有彎曲必須在中國(guó)太原誠(chéng)鑫達(dá)玻璃鋼制造廠進(jìn)行。

問(wèn)：我們可以在車(chē)間或現(xiàn)場(chǎng)彎曲誠(chéng)鑫達(dá)纖維筋嗎？

答：誠(chéng)鑫達(dá)采用獨(dú)特的專(zhuān)利方法，采用熱塑性耐腐蝕玻璃纖維制造。誠(chéng)鑫達(dá)可以像其他熱塑性塑料一樣進(jìn)行再加熱和再成型。加熱至200°C（攝氏度），直到達(dá)到足夠的柔軟度，使用適當(dāng)?shù)墓ぞ吆蛫A具彎曲。（注：為了達(dá)到最大強(qiáng)度，避免纖維彎曲和錯(cuò)位）。

問(wèn)：如何從平板車(chē)上吊起成新達(dá)和玻璃鋼鋼筋束？

答：玻璃鋼鋼筋比普通鋼筋更具彈性，因此應(yīng)避免鋼筋過(guò)度變形。吊裝一捆玻璃鋼鋼筋時(shí)，務(wù)必使用撐桿。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋強(qiáng)度與鋼材相比如何？

答：誠(chéng)鑫達(dá)玻璃纖維筋抗拉強(qiáng)度均大于1000 MPa（145 ksi），與鋼相比，GFRP鋼筋在失效前可承受兩倍的拉伸載荷。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋彈性模量與鋼相比如何？

答：誠(chéng)鑫達(dá)玻璃纖維筋的拉伸模量均大于65 GPa（9427 ksi），與鋼相比，GFRP鋼筋更靈活。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋應(yīng)變與鋼相比如何？

答：誠(chéng)鑫達(dá)玻璃纖維筋拉伸應(yīng)變均在1.5％至2.5％之間，與鋼相比，GFRP鋼筋應(yīng)變低于鋼。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋對(duì)堿性環(huán)境的抵抗力是什么？

答：誠(chéng)鑫達(dá)玻璃纖維筋均已根據(jù)CSA和ACI標(biāo)準(zhǔn)進(jìn)行耐久性標(biāo)準(zhǔn)測(cè)試，在直接暴露于pH值為13的堿性溶液2160小時(shí)后，它們均保持+ 90％的極限拉伸能力在60攝氏度，與鋼相比，GFRP鋼筋對(duì)甚至不銹鋼的耐受性更強(qiáng)。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋最高工作溫度是多少？

答： GFRP，F(xiàn)RP和CFRP，GFRP，BFRP和AFRP等任何其他復(fù)合產(chǎn)品的工作溫度取決于基質(zhì)或聚合物的玻璃化轉(zhuǎn)變溫度或使用溫度，與玻璃，玄武巖無(wú)關(guān)，與纖維類(lèi)型無(wú)關(guān)和碳纖維具有非常高的熔化和操作溫度。誠(chéng)鑫達(dá)玻璃纖維筋均可提供高工作溫度。誠(chéng)鑫達(dá)玻璃纖維筋玻璃化轉(zhuǎn)變溫度為攝氏度，誠(chéng)鑫達(dá)玻璃纖維筋工作溫度為110攝氏度。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋的最低工作溫度是多少？

答：誠(chéng)鑫達(dá)玻璃纖維筋均已根據(jù)CSA和ACI標(biāo)準(zhǔn)在-40攝氏度下進(jìn)行測(cè)試，效果為零，在某些情況下性能也有所提高。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋與螺紋鋼筋的價(jià)格相比如何？

答：按噸計(jì)算，誠(chéng)鑫達(dá)玻璃纖維筋是螺紋鋼筋成本的2到4倍。請(qǐng)記住，不銹鋼棒會(huì)腐蝕。按長(zhǎng)度算，玻璃纖維筋重量是螺紋鋼筋的1/4，花同樣的錢(qián)買(mǎi)到的纖維筋更多。

問(wèn)：誠(chéng)鑫達(dá)玻璃纖維筋與環(huán)氧涂層鋼筋（ECR）和鍍鋅鋼筋的價(jià)格相比如何？

答：誠(chéng)鑫達(dá)玻璃纖維筋的價(jià)格通常與鍍鋅和環(huán)氧樹(shù)脂涂層鋼筋相媲美，總安裝成本通常使GFRP螺紋鋼價(jià)格更具競(jìng)爭(zhēng)力。

問(wèn)：我們是否必須考慮螺紋鋼的初始成本？

答：在項(xiàng)目結(jié)束時(shí)，當(dāng)比較材料成本時(shí)，考慮使用誠(chéng)鑫達(dá)玻璃纖維筋材料通常比碳鋼更昂貴時(shí)，絕對(duì)不是這樣。但是，在考慮安裝，搬運(yùn)，運(yùn)輸，長(zhǎng)期維護(hù)和其他相關(guān)費(fèi)用時(shí)，F(xiàn)RP的總安裝成本對(duì)碳鋼更具競(jìng)爭(zhēng)力。

問(wèn)：為什么使用誠(chéng)鑫達(dá)玻璃纖維筋降低了項(xiàng)目成本？

答：智能設(shè)計(jì)師總是考慮項(xiàng)目的所有相關(guān)成本，考慮使用誠(chéng)鑫達(dá)玻璃纖維筋時(shí)，可以消除其中一些因素。

安裝時(shí)間

運(yùn)輸

處理和切割

表面覆蓋和去除防水膜和65mm瀝青的能力

用海水固化混凝土

短期和長(zhǎng)期維護(hù)費(fèi)用

問(wèn)：我們能否以1比1的鋼筋替代GFRP鋼筋？

答： GFRP鋼筋強(qiáng)度是鋼筋的兩倍，但比鋼筋更靈活，它的失效性能呈線性彈性，因此沒(méi)有屈服點(diǎn)可以確定。工程師必須遵守GFRP鋼筋的規(guī)范和標(biāo)準(zhǔn)，而不是鋼鐵。如果您有鋼結(jié)構(gòu)設(shè)計(jì)，我們可以幫助您將其更改為GFRP。

問(wèn)： GRADE I，GRADE II和GRADE III GFRP Rebar有什么區(qū)別？

答：誠(chéng)鑫達(dá)生產(chǎn)的玻璃纖維筋均被視為GRADE III，等級(jí)是指GFRP鋼筋的彈性模量。

等級(jí)I - E> 40GPa

等級(jí)II - E> 50GPa

等級(jí)III - E> 60GPa

問(wèn)：我們可以在活動(dòng)地震區(qū)（地震）中使用GFRP鋼筋嗎？

答：是的，GFRP鋼筋可用作受地震荷載條件影響的混凝土中的鋼筋。GFRP鋼筋能夠抵抗反向拉伸 - 壓縮循環(huán)而不會(huì)失效。GFRP材料表現(xiàn)出的大變形允許GFRP加固建筑物充分地消散地震能量。目前，在地震災(zāi)害中，GFRP鋼筋加固了100多座橋梁和結(jié)構(gòu)。

問(wèn)：設(shè)計(jì)師應(yīng)遵循哪些設(shè)計(jì)指南？

答： CSA和ACI提供了許多設(shè)計(jì)指南。

中國(guó)

JT/T406-2003 土木工程用玻璃纖維增強(qiáng)筋

GB50608-2010 纖維增強(qiáng)復(fù)合材料建設(shè)工程應(yīng)用技術(shù)規(guī)范

加拿大

CSA

CAN / CSA-S6-06（加拿大公路橋梁設(shè)計(jì)規(guī)范）

CAN / CSA-S806-02（用FRP設(shè)計(jì)和建造建筑構(gòu)件）

伊斯蘭國(guó)

設(shè)計(jì)手冊(cè)NO.3（FRP加固混凝土結(jié)構(gòu)）

設(shè)計(jì)手冊(cè)NO.5（FRP預(yù)應(yīng)力混凝土結(jié)構(gòu)）