Nanomodification of concrete has a promising potential to allow engineering concrete properties for specific applications. This study shows how nanoscale cellulose filaments (CF) can be used as a novel tool for tailoring the properties of strain-hardening cementitious composites (SHCC) incorporating high-volume ground-glass pozzolans (HVGP) towards improved strength and ductility. CF was introduced (at 0 − 0.10% by weight of cement) into SHCC incorporating ground-glass pozzolans (GP)−also known as postconsumption glass powder−in replacement of fly ash (FA) at 0, 40, and 100%. Micromechanical guidelines were adopted for tailoring SHCC formulations. The performance of resulting SHCC was then validated by uniaxial tensile and flexural tests. Results indicate that CF allows nanoengineering matrix and interface properties by increasing matrix elastic modulus and imparting a significant slip-hardening effect. Consequently, higher complementary energy and lower crack tip toughness were obtained, thereby leading to enhanced ductility. Therefore, whereas at high GP content (above 40%) matrix strength increases at the detriment of its ductility, the incorporation of CF imparted a characteristic slip-hardening effect enabling restoring the ductility loss at high GP content. This made possible to produce SHCC with up to 100% GP replacement of FA exhibiting higher strength and ductility than conventional FA-SHCC (with similar water to binder ratio), while contributing to promoting ecoefficiency.

混凝土的纳米改性具有使特定工程应用具有工程混凝土性能的潜力。这项研究表明，纳米级纤维素长丝（CF）可以用作一种新型工具，用于调整结合了大量毛玻璃毛火山灰（HVGP）的应变硬化水泥复合材料（SHCC）的性能，从而提高强度和延展性。将CF（以水泥的0-0.10％的重量）引入掺有毛玻璃火山灰（GP）（也称为消费后玻璃粉）的SHCC中，以0、40和100％的含量代替粉煤灰（FA）。采用微机械准则来定制SHCC配方。然后，通过单轴拉伸和弯曲试验验证了所得SHCC的性能。结果表明，CF通过增加基体的弹性模量并赋予显着的滑爽硬化效果，可以纳米工程化基体和界面性能。因此，获得了较高的互补能和较低的裂纹尖端韧性，从而导致延展性提高。因此，尽管在高GP含量（超过40％）时，基体强度会因其延展性而增加，但CF的引入赋予了特征性的滑爽硬化效应，能够恢复高GP含量时的延展性损失。这使得可以生产出比传统的FA-SHCC更高的强度和延展性的FA，而FA的GP替代率高达100％（具有相似的水对粘合剂比率），同时有助于提高生态效率。获得了更高的互补能和更低的裂纹尖端韧性，从而提高了延展性。因此，尽管在高GP含量（超过40％）时，基体强度会因其延展性而增加，但CF的引入赋予了特征性的滑爽硬化效应，能够恢复高GP含量时的延展性损失。这使得可以生产出比传统的FA-SHCC更高的强度和延展性的FA，而FA的GP替代率高达100％（具有相似的水对粘合剂比率），同时有助于提高生态效率。获得了更高的互补能和更低的裂纹尖端韧性，从而提高了延展性。因此，尽管在高GP含量（超过40％）时，基体强度会因其延展性而增加，但CF的引入赋予了特征性的滑爽硬化效应，能够恢复高GP含量时的延展性损失。这使得可以生产出比普通FA-SHCC更高的强度和延展性的FA，而FA的GP替代率高达100％（具有相似的水对粘结剂比率），同时有助于提高生态效率。CF的引入赋予了特征性的滑爽硬化效果，从而能够在高GP含量下恢复延展性损失。这使得可以生产出比传统的FA-SHCC更高的强度和延展性的FA，而FA的GP替代率高达100％（具有相似的水对粘合剂比率），同时有助于提高生态效率。CF的引入赋予了特征性的滑爽硬化效果，从而能够在高GP含量下恢复延展性损失。这使得可以生产出比传统的FA-SHCC更高的强度和延展性的FA，而FA的GP替代率高达100％（具有相似的水对粘合剂比率），同时有助于提高生态效率。